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KB Performance Piston Parts and Accessories
KB Performance Pistons have everything you want in a performance piston: the strength to withstand high compression and heat, lightweight design, and a price that fits...
KB Performance Pistons have everything you want in a performance piston: the strength to withstand high compression and heat, lightweight design, and a price that fits your budget. Most are forged from high-silicon aluminum alloy, then CNC-machined and heat-treated for strength up to 30% greater than stock. They’re also engineered with race-ready features like high upper compression-ring locations, gas-accumulator grooves, drilled oil returns, and spiral-lock retainer grooves. We also carry Keith Black Silv-O-Lite pistons for high quality in a lower-silicon stock replacement piston.
KB Performance Pistons have everything you want in a performance piston: the strength to withstand high compression and heat, lightweight design, and a price that fits your budget. Most are forged from high-silicon aluminum alloy, then CNC-machined and heat-treated for strength up to 30% greater than stock. They’re also engineered with race-ready features like high upper compression-ring locations, gas-accumulator grooves, drilled oil returns, and spiral-lock retainer grooves. We also carry Keith Black Silv-O-Lite pistons for high quality in a lower-silicon stock replacement piston.
AMC/JEEP 4.0 L6 Stroker - 4.6 w/258" Crank 8.9:1 + .010" CH
Part Number: UEM-KB10177-030
Not Yet Reviewed
Estimated Ship Date: May 26, 2026 if ordered today
Estimated Ship Date: May 26, 2026 if ordered today
KB Hyper Coated Piston - Holden 383 Stroker 5.7 Rod 3.750 Stroke
Part Number: UEM-KB442C030
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
KB Hyper Coated Piston - Holden 383 Stroker 5.7 Rod 3.750 Stroke Kit with Rings
Part Number: UEM-KB442CKTM060
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
AMC/JEEP 4.0 L6 Stroker - 4.6 w/258" Crank 8.9:1 + .010" CH
Part Number: UEM-KB10177-060
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
AMC/JEEP 4.0 L6 Stroker - 4.6 w/258" Crank 8.9:1 + .010" CH
Part Number: UEM-KB10177-STD
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
KB Hyper Coated Piston - Holden 383 Stroker 5.7 Rod 3.750 Stroke Kit with Rings
Part Number: UEM-KB442CKTMSTD
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
KB Hyper Coated Piston - Holden 383 Stroker 5.7 Rod 3.750 Stroke Kit with Rings
Part Number: UEM-KB442CKTM020
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
KB Hyper Coated Piston - Holden 383 Stroker 5.7 Rod 3.750 Stroke
Part Number: UEM-KB442C020
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
KB Hyper Coated Piston - Holden 383 Stroker 5.7 Rod 3.750 Stroke Kit with Rings
Part Number: UEM-KB442CKTM030
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
KB Hyper Coated Piston - Holden 383 Stroker 5.7 Rod 3.750 Stroke
Part Number: UEM-KB442C040
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
KB Hyper Coated Piston - Holden 383 Stroker 5.7 Rod 3.750 Stroke
Part Number: UEM-KB442CSTD
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Pistons, Hypereutectic, 3.895 in. Bore, 1.353 in. CH, Press/Floating Offset 0.931 in. Pins, with Locks, for Stroker Builds, Jeep, AMC L6, Set of 6
Part Number: UEM-KB424C-020
Not Yet Reviewed
Estimated Ship Date: May 26, 2026 if ordered today
Estimated Ship Date: May 26, 2026 if ordered today
KB Hyper Coated Piston - Holden 383 Stroker 5.7 Rod 3.750 Stroke
Part Number: UEM-KB442C060
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
KB Hyper Coated Piston - Holden 383 Stroker 5.7 Rod 3.750 Stroke Kit with Rings
Part Number: UEM-KB442CKTM040
Not Yet Reviewed
Estimated Ship Date: May 26, 2026 if ordered today
Estimated Ship Date: May 26, 2026 if ordered today
KB Hyper Coated Piston-AMC/JEEP 4.6" Stroker with 258" crank
Part Number: UEM-KB438C030
Not Yet Reviewed
AMC/JEEP 4.0 L6 Stroker - 4.6 w/258" Crank 8.9:1 + .010" CH
Part Number: UEM-KB10177STDK1
Not Yet Reviewed
Estimated Ship Date: May 26, 2026 if ordered today
Estimated Ship Date: May 26, 2026 if ordered today
KB Hyper Coated Single Piston-AMC/JEEP 4.6" Stroker with 258" crank
Part Number: UEM-SKB438C040
Not Yet Reviewed
Estimated Ship Date: May 26, 2026 if ordered today
Estimated Ship Date: May 26, 2026 if ordered today
Pistons, Hypereutectic, Dome, 4.250 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Set of 8
Part Number: UEM-KB397-STD
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Pistons, Hypereutectic, Flat, 4.040 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Set of 8
Part Number: UEM-KB231-040
Not Yet Reviewed
Estimated Ship Date: May 26, 2026 if ordered today
Estimated Ship Date: May 26, 2026 if ordered today
Pistons, Hypereutectic, Flat, 4.060 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Ford, Set of 8
Part Number: UEM-KB320-060
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Pistons, Hypereutectic, Dome, 4.040 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Set of 8
Part Number: UEM-KB213-040
Not Yet Reviewed
Estimated Ship Date: May 26, 2026 if ordered today
Estimated Ship Date: May 26, 2026 if ordered today
Pistons, Hypereutectic, Step, 4.402 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Mopar, Set of 8
Part Number: UEM-KB251-060
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Pistons, Hypereutectic, Flat, 4.080 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Set of 8
Part Number: UEM-KB228-080
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Pistons, Hypereutectic, Flat, 4.060 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Set of 8
Part Number: UEM-KB171-060
Estimated Ship Date: Monday 4/20/2026 if shipped by air
Estimated Ship Date: Monday 4/20/2026 if shipped by air
Pistons, Hypereutectic, Step, 4.382 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Mopar, Set of 8
Part Number: UEM-KB215-040
Not Yet Reviewed
Estimated Ship Date: Monday 4/20/2026 if shipped by air
Estimated Ship Date: Monday 4/20/2026 if shipped by air
