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K20A3 / K24A

A USDM only production engine, the K20A3 and similar cylinder head configurations were developed for a performance, yet economical mindset. Although VTEC, it is only featured on the intake camshaft. The K20A3 is found in the 01-03 Civic Si while the K24A1 is in the 01-03 CR-V. The K24A4 is the most popular of them all due to the fact that was used to service the 03-up Accord as well as the 02-03 Element. Because of it's tall deck height (9.114"), the trend will be to take these blocks and use the K20A/K20Z head found in the 06-up Civic, 01-06 RSX-S for more rpm potential and added tuning ability. However there will be plenty of tuners wanting to stay true and run the original K20A3 head.

AR8900

AR8900 - Connecting Rod Fastener/Rod Bolt - ARP2000 (3/8" x 1.600") - 1 only unit

Connecting Rod Fastener/Rod Bolt - ARP2000 (3/8" x 1.600") ARP #4AJ1.600-2SU - Item is sold as 1 ...

Connecting Rod Fastener/Rod Bolt - ARP2000 (3/8" x 1.600") ARP #4AJ1.600-2SU - Item is sold as 1 only unit, specify total quantity required when ordering. Does not fit OEM rods.

$ 7.56 $ 8.92


AR8910

AR8910 - Connecting Rod Fastener/Rod Bolt - ARP Custom Age 625+ (3/8" x 1.600") - 1 only unit

Connecting Rod Fastener/Rod Bolt - ARP Custom Age 625+ (3/8" x 1.600") ARP #4AJ1.600-10SLU - Item...

Connecting Rod Fastener/Rod Bolt - ARP Custom Age 625+ (3/8" x 1.600") ARP #4AJ1.600-10SLU - Item is sold as 1 only unit, specify total quantity required when ordering. Does not fit OEM rods.

$ 26.11 $ 30.81


BC0040

BC0040 - Honda K20A/K20Z/F20C/F22C Spring/Titanium Retainer/Seat 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 BC1040 Dual Free Length 2.025" Seat 1.590" @ 80 lbs Open 1.110" @ 250 lbs Coil Bind 1.030" Retainer BC2010 Spring Seat BC2904 Net Cam Lift 0.550" / 13.97mm

$ 500.48 $ 590.57


BC0040S

BC0040S - Honda K20A/K20Z/F20C/F22C Spring/Steel Retainer/Seat 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 BC1040 Dual Free Length 2.025" Seat 1.590" @ 80 lbs Open 1.110" @ 250 lbs Coil Bind 1.030" Retainer BC2011 Spring Seat BC2904 Net Cam Lift 0.550" / 13.97mm

$ 412.13 $ 486.31


BC0044

BC0044 - Honda K20A Stroker Kit - 92mm Stroke/LightWeight Rods (B18A Journal)

K20 block/head 2.35L - Includes 4340 billet crank, 92mm stroke w/B18A rod journals, LightWeight r...

K20 block/head 2.35L - Includes 4340 billet crank, 92mm stroke w/B18A rod journals, LightWeight rods (5.512 c-to-c), custom pistons (choice of bore/compression). ACL rod/main bearings available separately. Crank # BC5048 - 92mm Rod # BC6050 - 5.512" Piston # BC7048 - Custom

$ 3,505.05 $ 4,135.96


BC0044LW

BC0044LW - Honda K20A Stroker Kit - LW 92mm Stroke/LightWeight Rods (B18A journal)

K20 block/head 2.35L - Includes 4340 billet LightWeight crank, 92mm stroke w/B18A rod journals, L...

K20 block/head 2.35L - Includes 4340 billet LightWeight crank, 92mm stroke w/B18A rod journals, LightWeight rods (5.512 c-to-c), custom pistons (choice of bore/compression). ACL rod/main bearings available separately. Crank # BC5048LW - 92mm Rod # BC6050 - 5.512" Piston # BC7048 - Custom

$ 3,608.15 $ 4,257.62


BC0045

BC0045 - Honda K20A Stroker Kit - 92mm Stroke/ProH2K Long Rods (5.512"/B18A Journal)

K20 block/head 2.35L - Includes 4340 billet crank, 92mm stroke w/B18A rod journals, ProH2K long r...

K20 block/head 2.35L - Includes 4340 billet crank, 92mm stroke w/B18A rod journals, ProH2K long rods (5.512 c-to-c), custom pistons (choice of bore/compression). ACL rod/main bearings available separately. Crank # BC5048 - 92mm Rod # BC6040 - 5.512" Piston # BC7048 - Custom

$ 3,505.05 $ 4,135.96


BC0048

BC0048 - Honda K24 Stroker Kit - 102mm Stroke/LightWeight Rods (5.985"/B18A Journal)

K24 block/K20 head 2.60L - Includes 4340 billet crank, 102mm stroke w/B18A rod journals, LightWei...

K24 block/K20 head 2.60L - Includes 4340 billet crank, 102mm stroke w/B18A rod journals, LightWeight rods (5.985 c-to-c), custom pistons (choice of bore/compression). ACL rod/main bearings available separately. Crank # BC5049 - 102mm Rod # BC6059 - 5.985" Piston # BC7049 - Custom

$ 3,505.05 $ 4,135.96


BC0049

BC0049 - Honda K24 Stroker Kit - 102mm Stroke/ProH2k Rods (5.985"/B18A Journal)

K24 block/head 2.60L - Includes 4340 billet crank, 102mm stroke w/B18A rod journals, ProH2k rods ...

K24 block/head 2.60L - Includes 4340 billet crank, 102mm stroke w/B18A rod journals, ProH2k rods (5.985" c-to-c), custom pistons (choice of bore/compression). ACL rod/main bearings available separately. Crank # BC5049 - 102mm Rod # BC6049 - 5.985" Piston # BC7049 - Custom

$ 3,505.05 $ 4,135.96


BC0050

BC0050 - Honda K20A3/K24A1 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 BC1050 Single Free Length 1.879" Seat 1.567" @ 78 lbs Open 1.100" @ 206 lbs Coil Bind 0.972" Retainer BC2050 Spring Seat OEM Net Cam Lift 0.520" / 13.2mm

$ 342.68 $ 404.36


BC0051

BC0051 - Honda K20A3/K24A1 Stage 2 Cams - Normally Aspirated / Forced Induction

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 BC0050. Adv Dur 284°/284° Dur @ .050 193°/193° Valve Lift (1.75:1) .410"/.410" Valve Lift (mm) 10.41/10.41

$ 628.25 $ 741.34


BC2940

BC2940 - Honda/Acura 5.5mm Billet Keepers/Locks (fits BC2010 and BC2011)

5.5mm Stem, 7í«̴́ Billet Keepers/Locks set/32 - NOTE: If running late model cylinder head (K20 af...

5.5mm Stem, 7í«̴́ Billet Keepers/Locks set/32 - NOTE: If running late model cylinder head (K20 after 2004), you may need to purchase BC2940 keepers to accommodate BC2010 or BC2011 retainers.

$ 100.12 $ 118.14


BC3040

BC3040 - Honda/Acura K20A2/K20A/K20Z3 Intake Valves (35mm / 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...

$ 159.79 $ 188.55


BC3041

BC3041 - Honda/Acura K20A2/K20A/K20Z3 Exhaust 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...

$ 159.79 $ 188.55


BC3044

BC3044 - Honda/Acura K20A2/K20A/K20Z3 Intake Valves (36mm / +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...

$ 159.79 $ 188.55


BC3045

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...

$ 159.79 $ 188.55


BC3904

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

$ 73.30 $ 86.49


BC3905

BC3905 - Honda K Series VTEC (K20A/Z, K24A) Exhuast Valve Guides

5.5mm Exhaust - Manganese Silicon Aluminum Bronze

5.5mm Exhaust - Manganese Silicon Aluminum Bronze

$ 73.30 $ 86.49


BC4020

BC4020 - ACL Honda B18A/B Bearing Set - OEM Sizing / BC K-Series Stroker

ACL Race Series HX: Rods - ACL #4B1946HX (44.98-45.00mm) Mains - ACL #5M1959HX (54.98-55.00mm) Th...

ACL Race Series HX: Rods - ACL #4B1946HX (44.98-45.00mm) Mains - ACL #5M1959HX (54.98-55.00mm) Thrust - ACL #1T1957 (61.25-61.50mm) 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.

$ 210.49 $ 248.38


BC4025

BC4025 - ACL Honda K20A2/Z3 Bearing Set - OEM Sizing

ACL Race Series HX: Rods - ACL #4B1972HX (47.98-48.00mm) Mains - ACL #5M1959HX (54.98-55.00mm) Th...

ACL Race Series HX: Rods - ACL #4B1972HX (47.98-48.00mm) Mains - ACL #5M1959HX (54.98-55.00mm) Thrust - ACL #1T1957 (61.25-61.50mm) 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.

$ 210.49 $ 248.38


BC5047

BC5047 - Honda/Acura K20 Crankshaft - 4340 Billet - 92mm Stroke w/OEM Rod Journal

92mm stroke, 47.95mm crank pin, 55mm main - 4340 billet

92mm stroke, 47.95mm crank pin, 55mm main - 4340 billet

$ 2,181.49 $ 2,574.16


BC5048

BC5048 - Honda/Acura K20 Crankshaft - 4340 Billet - 92mm Stroke w/B18A Rod Journal

4340 billet with B18A rod journal. All cranks are stress relieved, shot peened, magna flux inspec...

4340 billet with B18A rod journal. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential. Stroke 92mm Rod Journal 45mm Main Journal 55mm Weight 36.5 Lbs

$ 2,181.49 $ 2,574.16


BC5049-103

BC5049-103 - Honda/Acura K24 Crankshaft - 4340 Billet - 103mm Stroke w/B18A Rod Journal

4340 billet with B18A rod journal. All cranks are stress relieved, shot peened, magna flux inspec...

4340 billet with B18A rod journal. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential. Stroke 103mm Rod Journal 45mm Main Journal 55mm Weight 32.6 Lbs

$ 2,181.49 $ 2,574.16


BC5049-105

BC5049-105 - Honda/Acura K24 Crankshaft - 4340 Billet - 105mm Stroke w/B18A Rod Journal

4340 billet with B18A rod journal. All cranks are stress relieved, shot peened, magna flux inspec...

4340 billet with B18A rod journal. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential. Stroke 105mm Rod Journal 45mm Main Journal 55mm Weight 37.0 Lbs

$ 2,181.49 $ 2,574.16


BC5049-99

BC5049-99 - Honda/Acura K20 Crankshaft - 4340 Billet - 99mm Stroke w/B16A Rod Journal

4340 billet with B18A rod journal. All cranks are stress relieved, shot peened, magna flux inspec...

4340 billet with B18A rod journal. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential. Stroke 99mm Rod Journal 45mm Main Journal 55mm

$ 2,181.49 $ 2,574.16


BC5049

BC5049 - Honda/Acura K24 Crankshaft - 4340 Billet - 102mm Stroke w/B18A Rod Journal

4340 billet with B18A rod journal. All cranks are stress relieved, shot peened, magna flux inspec...

4340 billet with B18A rod journal. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential. Stroke 102mm Rod Journal 45mm Main Journal 55mm Weight 33.6 Lbs

$ 2,181.49 $ 2,574.16


BC6042

BC6042 - Honda/Acura K24A - ProH2K Connecting Rods w/ARP2000 Fasteners

Honda/Acura K24A - ProH2K (formerly Sportsman) w/ARP2000 Fasteners. Made from aerospace grade, 43...

Honda/Acura K24A - ProH2K (formerly Sportsman) 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 5.985" BE Bore 2.008" BE Width 0.780" PE Bore 0.866" PE Width 0.780" Gram Wt...

$ 487.49 $ 575.24


BC6045

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...

$ 763.52 $ 900.95


BC6049

BC6049 - Honda/Acura - ProH2k Stroker w/ARP2000 Fasteners 5.985" C-to-C w/B16A Journal

Honda/Acura - ProH2k Stroker Connecting Rods w/ARP2000 Fasteners. Made from aerospace grade, 4340...

Honda/Acura - ProH2k Stroker Connecting Rods 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 5.985" BE Bore 1.890" BE Width 0.935" PE Bore 0.827" PE Width 0.900" Gram Wt 5...

$ 487.49 $ 575.24


BC6052

BC6052 - Honda/Acura K24A - LightWeight Connecting Rods w/ARP2000 Fasteners - Rated to 350WHP

Honda/Acura K24A - LightWeight w/ARP2000 Fasteners. Made from aerospace grade, 4340 chromoly stee...

Honda/Acura K24A - LightWeight w/ARP2000 Fasteners. Made from aerospace grade, 4340 chromoly steel, BC high performance LW connecting rods deliver the throttle response and the RPM range required for high revs. 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 422 Torque Specs 45 ft lbs ...

$ 487.49 $ 575.24


BC6055

BC6055 - Honda/Acura K24A - MidWeight Connecting Rods w/ARP2000 Fasteners - Rated to 500WHP

Honda/Acura K24A - MidWeight I-Beam rods w/ARP2000 Fasteners. Made from aerospace grade, 4340 chr...

Honda/Acura K24A - MidWeight I-Beam rods w/ARP2000 Fasteners. Made from aerospace grade, 4340 chromoly steel, BC high performance MidWeight I-Beam connecting rods are the perfect solution for when you're making too much power (350HP) for the BC LightWeight's. 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 Wid...

$ 774.80 $ 914.26


BC6059

BC6059 - Honda/Acura - LightWeight Stroker w/ARP2000 Fasteners 5.985" C-to-C w/B16A Journa...

Honda/Acura - LightWeight Stroker w/ARP2000 Fasteners. Made from aerospace grade, 4340 chromoly s...

Honda/Acura - LightWeight Stroker w/ARP2000 Fasteners. Made from aerospace grade, 4340 chromoly steel, BC high performance LW connecting rods deliver the throttle response and the RPM range required for high revs. 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 1.890" BE Width 0.932" PE Bore 0.827" PE Width 0.890" Gram Wt 490 Torque Specs 45 ft l...

$ 487.49 $ 575.24


BC8005

BC8005 - Honda K20 Darton M.I.D. Block Sleeves (87mm to 90mm bore)

Honda K20 - Darton #400-190 M.I.D. Block Sleeves (87 to 90mm Bore) - 3.375" Semi Bore Size

Honda K20 - Darton #400-190 M.I.D. Block Sleeves (87 to 90mm Bore) - 3.375" Semi Bore Size

$ 754.58 $ 890.40


BC8006

BC8006 - Honda K24 Darton M.I.D. Block Sleeves (87mm to 90mm bore)

Honda K24 - Darton #400-200 M.I.D. Block Sleeves (87 to 90mm Bore) - 3.415" Semi Bore Size

Honda K24 - Darton #400-200 M.I.D. Block Sleeves (87 to 90mm Bore) - 3.415" Semi Bore Size

$ 851.64 $ 1,004.94


BC8206

BC8206 - Honda K24 BC Head Gaskets - 87mm Bore

BC Made In Japan Head Gaskets - Honda K24 - 87mm Bore / 0.8mm Thickness

BC Made In Japan Head Gaskets - Honda K24 - 87mm Bore / 0.8mm Thickness

$ 130.22 $ 153.66


BC8207

BC8207 - Honda K24 BC Head Gaskets - 89mm Bore

BC Made In Japan Head Gaskets - Honda K24 - 89mm Bore / 0.8mm Thickness

BC Made In Japan Head Gaskets - Honda K24 - 89mm Bore / 0.8mm Thickness

$ 141.07 $ 166.46


BC8700

BC8700 - Connecting Rod Bushing - .787" / 20mm Diameter - 1 only unit

Connecting Rod Bushing - .787" / 20mm Diameter - Aluminum Bronze material - Item is sold as 1 onl...

Connecting Rod Bushing - .787" / 20mm Diameter - Aluminum Bronze material - Item is sold as 1 only unit, specify total quantity required when ordering.

$ 15.46 $ 18.24


BC8702

BC8702 - Connecting Rod Bushing - .866" / 22mm Diameter - 1 only unit

Connecting Rod Bushing - .866" / 22mm Diameter - Aluminum Bronze material - Item is sold as 1 onl...

Connecting Rod Bushing - .866" / 22mm Diameter - Aluminum Bronze material - Item is sold as 1 only unit, specify total quantity required when ordering.

$ 15.46 $ 18.24


BC8703

BC8703 - Connecting Rod Bushing - .905" / 23mm Diameter - 1 only unit

Connecting Rod Bushing - .905" / 23mm Diameter - Aluminum Bronze material - Item is sold as 1 onl...

Connecting Rod Bushing - .905" / 23mm Diameter - Aluminum Bronze material - Item is sold as 1 only unit, specify total quantity required when ordering.

$ 15.46 $ 18.24