HONDA

BC0070 - Honda D16Y8/D16Z6 Spring/Titanium Retainer Kit

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, supe...

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. Type BC1070 Single Free Length 2.231" Seat 1.975" @ 58 lbs Open 1.500" @ 154 lbs Coil Bind 1.320" Retainer BC2070 Spring Seat OEM Net Cam Lift 0.490" / 12.45mm

BC1070-1 - Valve Spring - Single (Honda D16Y8/D16Z6) - 1 only

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, supe...

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. Type Single Free Length 2.231" Seat 1.975" @ 58 lbs Open 1.500" @ 154 lbs Coil Bind 1.320" Retainer BC2070, OEM Spring Seat OEM Net Cam Lift 0.490" / 12.45mm

BC0010S - Honda B16A/B18C Spring/Steel Retainer Kit

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, supe...

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. Type BC1010 Dual Free Length 1.607" Seat 1.350" @ 80 lbs Open 0.900" @ 220 lbs Coil Bind 0.765" Retainer BC2011 Spring Seat OEM Net Cam Lift 0.500" / 12.7mm

BC0032 - Honda H22 Stage 2 Camshafts - Normally Aspirated/High Boost Profile

All motor with 11.5:1+ compression or high boost (18lbs+) applications. Use with CAI, H, E, ECU, ...

All motor with 11.5:1+ compression or high boost (18lbs+) applications. Use with CAI, H, E, ECU, A/F mods. Excellent street manners. Requires kit BC0030 or BC0030S. Adv Dur 312°/310° Dur @ .050 255°/248° Valve Lift (1.55:1) .470"/.469" Valve Lift (mm) 11.94/11.91 Cam Timing Tag

BC0012 - Honda B16A/B18C Stage 2 Camshafts - Normally Aspirated Spec

Hot street/strip or road race spec. Use with CAI, H, E, ECU, A/F mods. Excellent street manners a...

Hot street/strip or road race spec. Use with CAI, H, E, ECU, A/F mods. Excellent street manners and idle quality. Requires kit BC0010 or BC0010S. Adv Dur 306°/300° Dur @ .050 254°/248° Valve Lift (1.55:1) .472"/.472" Valve Lift (mm) 11.99/11.99 Cam Timing Tag

BC3011-1 - Individual Honda/Acura B16A/B18C Exhaust Valves (28mm / STD) - 1 only valve

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC0046-2 - Honda K20A/K20Z Stage 4 Camshafts - Normally Aspirated Spec

Aggressive profile designed for fully built engines with high compression (12.5:1 minimum) and mo...

Aggressive profile designed for fully built engines with high compression (12.5:1 minimum) and modifications. Aftermarket tuning is mandatory. 3 lobe design. Requires BC0040T kit. Adv Dur 324°/320° Dur @ .050 255°/248° Valve Lift (1.75:1) .564"/.509" Valve Lift (mm) 14.32/12.93 Cam Timing Tag

BC0013 - Honda B16A/B18C Stage 3 Camshafts - Normally Aspirated Spec

Intended for fully built engine. Extensive modifications, high compression pistons and tuning rec...

Intended for fully built engine. Extensive modifications, high compression pistons and tuning recommended. Requires kit BC0010 or BC0010S. Adv Dur 310°/308° Dur @ .050 260°/254° Valve Lift (1.55:1) .496"/.496" Valve Lift (mm) 12.60/12.60 Cam Timing Tag

BC0021 - Honda/Acura B18A/B Stage 2 Camshafts - Forced Induction Spec

Short duration profile builds cylinder pressure by reducing overlap, high lift for more air intak...

Short duration profile builds cylinder pressure by reducing overlap, high lift for more air intake. Requires kit BC0020. Adv Dur 280°/280° Dur @ .050 204°/204° Valve Lift (1.75:1) .470"/.470" Valve Lift (mm) 11.94/11.94 Cam Timing Tag

AR8608 - Honda D16Y8 Head ARP Head Studs

Honda D16Y8 ARP Head Studs - ARP #208-4702 - 8740 Alloy Heat Treated to 200,000 p.s.i.

Honda D16Y8 ARP Head Studs - ARP #208-4702 - 8740 Alloy Heat Treated to 200,000 p.s.i.

BC3061 - Honda F20C/F22C Exhaust Valves (31mm / STD) - set/8

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC3010B - Honda/Acura B16A/B18C Intake Valves (33mm / STD / Black Nitride w/Flat Face) - s...

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC3908 - Honda D Series VTEC (D16Y8/D16Z6) Intake Valve Guides

5.5mm Intake - Manganese Silicon Aluminum Bronze

5.5mm Intake - Manganese Silicon Aluminum Bronze

BC3010S-8 - Honda/Acura B16A/B18C Intake Valves (33mm / STD) - set/8

BLACK NITRIDE VALVES - Brand new valves but not the new style BC polished with dish face. Blowing...

BLACK NITRIDE VALVES - Brand new valves but not the new style BC polished with dish face. Blowing out existing inventory. These are stainless steel, black nitride finish with flat face. While supplies last. All sales final. ndercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head. Head Dia 3...

BC2010-1 - Titanium Retainer - (Honda/Acura B18C/B16A, H22, K Series, F Series) Limited M...

BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances. BC r...

BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances. BC recommends using titanium retainers on dual springs ONLY if limited street use (less than 7000 miles per year). Although titanium is approximately 40% lighter, and is perceived as stronger than steel, it will wear over time on a dual spring setup. Stem 5.5mm O.D. 1.047" Step 1 0.866" Step 2 0.605" Inst Ht Stock Gram Wt 6.8

BC3901-2 - Honda H22 Series VTEC Exhuast Valve Guides

5.5mm Exhaust - Manganese Silicon Aluminum Bronze

5.5mm Exhaust - Manganese Silicon Aluminum Bronze

BC3900-2 - Honda H22 Series VTEC Intake Valve Guides

5.5mm Intake - Manganese Silicon Aluminum Bronze

5.5mm Intake - Manganese Silicon Aluminum Bronze

BC3070 - Honda D16Y8/D16Z6 Intake Valves (30mm / STD) - set/8

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC3020 - Honda/Acura B18A/B Intake Valves (31mm / STD) - set/8

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC2070S-1 - Steel Retainer - (Honda D16Y8/D16Z6, R18, L15) - 1 only

BC steel retainers are CNC machined from hardened 4140 round bar chromoly steel to exacting toler...

BC steel retainers are CNC machined from hardened 4140 round bar chromoly steel to exacting tolerances. BC recommends using steel retainers for all high mileage, dual spring applications (over 7000 miles annually) or when looking to cut expenses. Stem 5.5mm O.D. 0.875" Step 1 0.612" Step 2 N/A Inst Ht Stock Gram Wt 8.0

BC3904 - Honda K Series VTEC (K20A/Z, K24A) Intake Valve Guides

5.5mm Intake - Manganese Silicon Aluminum Bronze

5.5mm Intake - Manganese Silicon Aluminum Bronze

BC3060 - Honda F20C/F22C Intake Valves (36mm / STD) - set/8

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC3031-1 - Individual Honda H22/H22A Exhaust Valves (30mm / STD) - 1 only valve

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC3010-1 - Individual Honda/Acura B16A/B18C Intake Valves (33mm / STD) - 1 only valve

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC6008 - Honda R18 (JDM/Euro Civic 06-up) - ProH2K Connecting Rods w/ARP2000 Fasteners

Honda R18 - ProH2K w/ARP2000 Fasteners. Made from aerospace grade, 4340 chromoly steel, BC high p...

Honda R18 - ProH2K w/ARP2000 Fasteners. Made from aerospace grade, 4340 chromoly steel, BC high performance connecting rods deliver the reliability required to turn up the boost, the nitrous and/or the RPM range. Every rod is CNC machined, micropolished surface finish treatment, equipped with Aluminum/Silicone/Bronze pin bushings and finish honed to exacting tolerances. C-to-C 6.200" BE Bore 1.890" BE Width 0.761" PE Bore 0.787" PE Width 0.761" Gram Wt 470 Torque Specs 45 ft lb...

BC3907 - Honda F Series VTEC (F20C/F22C) Exhuast Valve Guides

5.5mm Exhaust - Manganese Silicon Aluminum Bronze

5.5mm Exhaust - Manganese Silicon Aluminum Bronze

BC3902 - Honda/Acura B18A, B18B, B20B, H23 Intake Valve Guides

6.6mm Intake - Manganese Silicon Aluminum Bronze

6.6mm Intake - Manganese Silicon Aluminum Bronze

AR8601 - Honda B18C ARP Head Studs

Honda B18C ARP Head Studs - ARP #208-4303 - 8740 Alloy Heat Treated to 200,000 p.s.i.

Honda B18C ARP Head Studs - ARP #208-4303 - 8740 Alloy Heat Treated to 200,000 p.s.i.

BC3074S-8 - Honda D16Y8/D16Z6 Intake Valves (30.5mm / +.5mm) - set/8

BLACK NITRIDE VALVES - Brand new valves but not the new style BC polished with dish face. Blowing...

BLACK NITRIDE VALVES - Brand new valves but not the new style BC polished with dish face. Blowing out existing inventory. These are stainless steel, black nitride finish with flat face. While supplies last. All sales final. ndercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head. Head Dia 3...

AR8600 - Honda B16A ARP Head Studs

Honda B16A ARP Head Studs - ARP #208-4601 - 8740 Alloy Heat Treated to 200,000 p.s.i.

Honda B16A ARP Head Studs - ARP #208-4601 - 8740 Alloy Heat Treated to 200,000 p.s.i.

BC3045 - Honda/Acura K20A2/K20A/K20Z3 Exhaust Valves (31mm / +1mm) - set/8

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC3011 - Honda/Acura B16A/B18C Exhaust Valves (28mm / STD) - set/8

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

AR8704 - Honda H22 ARP Main Studs

Honda H22 ARP Main Studs - ARP #208-5401 - 8740 Alloy Heat Treated to 200,000 p.s.i.

Honda H22 ARP Main Studs - ARP #208-5401 - 8740 Alloy Heat Treated to 200,000 p.s.i.

AR8602 - Honda B18A/B ARP Head Studs

Honda B18A/B ARP Head Studs - ARP #208-4302 - 8740 Alloy Heat Treated to 200,000 p.s.i.

Honda B18A/B ARP Head Studs - ARP #208-4302 - 8740 Alloy Heat Treated to 200,000 p.s.i.

CP2090 - Honda Talon 1000 (19-up) CP Shelf Pistons w/All Hardware - 92mm x 9.5:1

Pistons are the backbone of any true hardcore racing engine and that’s where CP-Carrillo excels. ...

Pistons are the backbone of any true hardcore racing engine and that’s where CP-Carrillo excels. Our Engineering department started off analyzing the competition, gathering industry data and deciding to make the highest level of pistons, period. The heart and soul of our pistons are built through our Engineering Department and its resources. This department is made up of several factors that push them ahead of the competition; Reverse Engineering, Design Experience and Flexibility, Analysis a...

BC3070S-8 - Honda D16Y8/D16Z6 Intake Valves (30mm / STD) - set/8

BLACK NITRIDE VALVES - Brand new valves but not the new style BC polished with dish face. Blowing...

BLACK NITRIDE VALVES - Brand new valves but not the new style BC polished with dish face. Blowing out existing inventory. These are stainless steel, black nitride finish with flat face. While supplies last. All sales final. ndercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head. Head Dia 3...

BC0088 - Honda L15B7 Spring/Titanium Retainer/Keeper Kit

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, supe...

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. Type BC1070 IN/1089 EX Free Length 2.231" Seat 1.975" @ 58 lbs Open 1.500" @ 154 lbs Coil Bind 1.320" Retainer BC2070 Keepers BC2940 Net Cam Lift 0.490" / 12.45mm

BC1040T-1 - Valve Spring - Dual (Honda/Acura K20A2/K20A/K24A2/F20C1/F22C1) - 1 only

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, supe...

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. Type Dual Free Length 2.030" Seat 1.590" @ 80 lbs Open 1.020" @ 215 lbs Coil Bind 0.870" Retainer BC2010, BC2011 Spring Seat BC2904 or OEM Net Cam Lift 0.620" / 15.74mm

BC8004 - Honda H22/H23 Darton M.I.D. Block Sleeves w/Phosphate Coating (87mm to 90mm bore)

Honda H22/H23 - Darton #400-160P M.I.D. Block Sleeves w/Phosphate Coating (87 to 90mm Bore) - 3.4...

Honda H22/H23 - Darton #400-160P M.I.D. Block Sleeves w/Phosphate Coating (87 to 90mm Bore) - 3.415" Semi Bore Size

BC3014 - Honda/Acura B16A/B18C Intake Valves (34mm / +1mm) - set/8

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC0010 - Honda B16A/B18C Spring/Titanium Retainer Kit

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, supe...

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. Type BC1010 Dual Free Length 1.607" Seat 1.350" @ 80 lbs Open 0.900" @ 220 lbs Coil Bind 0.765" Retainer BC2010 Spring Seat OEM Net Cam Lift 0.500" / 12.7mm

BC3061-1 - Individual Honda F20C/F22C Exhaust Valves (31mm / STD) - 1 only valve

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC3014-1 - Individual Honda/Acura B16A/B18C Intake Valves (34mm / +1mm) - 1 only valve

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC2020S-1 - Steel Retainer - (Honda/Acura B18A/B18B/B20B) - 1 only

BC steel retainers are CNC machined from hardened 4140 round bar chromoly steel to exacting toler...

BC steel retainers are CNC machined from hardened 4140 round bar chromoly steel to exacting tolerances. BC recommends using steel retainers for all high mileage, dual spring applications (over 7000 miles annually) or when looking to cut expenses. Stem 6.5mm O.D. 1.102" Step 1 0.806" Step 2 0.599" Inst Ht Stock Gram Wt 11.3

BC1040-1 - Valve Spring - Dual (Honda/Acura K20A2/K20A/K24A2/F20C1/F22C1) - 1 only

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, supe...

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. Type Dual Free Length 2.025" Seat 1.590" @ 80 lbs Open 1.110" @ 250 lbs Coil Bind 1.030" Retainer BC2010, BC2011 Spring Seat BC2904 or OEM Net Cam Lift 0.550" / 13.97mm

BC0080S - Honda R18 Single Spring/Steel Retainer/Keeper Kit

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, supe...

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. Type BC1070 Single Free Length 2.231" Seat 1.975" @ 58 lbs Open 1.500" @ 154 lbs Coil Bind 1.320" Retainer BC2070S Keepers BC2940 Net Cam Lift 0.490" / 12.45mm

BC6018 - Honda B16A - ProH2K Connecting Rods w/ARP2000 Fasteners

Honda B16A - ProH2K w/ARP2000 Fasteners. Made from aerospace grade, 4340 chromoly steel, BC high ...

Honda B16A - ProH2K w/ARP2000 Fasteners. Made from aerospace grade, 4340 chromoly steel, BC high performance connecting rods deliver the reliability required to turn up the boost, the nitrous and/or the RPM range. Every rod is CNC machined, micropolished surface finish treatment, equipped with Aluminum/Silicone/Bronze pin bushings and finish honed to exacting tolerances. C-to-C 5.290" BE Bore 1.890" BE Width 0.932" PE Bore 0.827" PE Width 0.890" Gram Wt 532 Torque Specs 45 ft l...

BC8001-1 - Honda B18 Darton M.I.D. Block Sleeves w/Phosphate Coating (81mm to 85mm bore)

Honda B18 - Darton #400-130P M.I.D. Block Sleeves w/Phosphate Coating (81 to 85mm Bore) - 3.180" ...

Honda B18 - Darton #400-130P M.I.D. Block Sleeves w/Phosphate Coating (81 to 85mm Bore) - 3.180" Semi Bore Size

BC6045 - Honda/Acura K24 - ProH625+ Connecting Rods w/ARP Custom Age 625+ Fasteners

Honda/Acura K24 - ProH625+ w/ARP Custom Age 625+ Fasteners. Made from aerospace grade, 4340 chrom...

Honda/Acura K24 - ProH625+ w/ARP Custom Age 625+ Fasteners. Made from aerospace grade, 4340 chromoly steel, BC high performance connecting rods deliver the reliability required to turn up the boost, the nitrous and/or the RPM range. Every rod is CNC machined, micropolished surface finish treatment, equipped with Aluminum/Silicone/Bronze pin bushings and finish honed to exacting tolerances. C-to-C 5.985" BE Bore 2.008" BE Width 0.780" PE Bore 0.866" PE Width 0.780" Gram Wt 537 T...

BC4060 - ACL Honda F20C/F22C Bearing Set - OEM Sizing

ACL Race Series HX: Rods - ACL #4B1912HX (47.98-48.00mm) Mains - ACL #5M1913HX (54.976-55.00mm) T...

ACL Race Series HX: Rods - ACL #4B1912HX (47.98-48.00mm) Mains - ACL #5M1913HX (54.976-55.00mm) The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from high performance Trimetal engine bearings. Designed to withstand higher RPM conditions, ACL Race Series Engine Bearings are available for many of the popular 4, 6 & 8 cylinder applications.