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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.
Pistons, KB Performance, 4.400 in. Bore, Flat, 1.900 in. Compression Ht., Press/Float Pin, 5/64 x 5/64 x 3/16 Ring Grooves, with Rings, Ford, V8, Kit
Part Number: UEM-KB368KTM-040
Not Yet Reviewed
Estimated Ship Date: Feb 5, 2026 if ordered today
Estimated Ship Date: Feb 5, 2026 if ordered today
Pistons, KB Performance, 4.195 in. Bore, Step, 1.510 in. Compression Height, Press/Float Pin, 5/64 x 5/64 x 3/16 Ring Grooves, AMC, Set of 8
Part Number: UEM-KB419-030
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pistons, KB Performance, 4.000 in. Bore, Step, 1.465 in. Compression Height, Press/Float Pin, 5/64 x 5/64 x 3/16 Ring Grooves, Mopar, Set of 8
Part Number: UEM-KB416-STD
Not Yet Reviewed
Estimated Ship Date: Feb 5, 2026 if ordered today
Estimated Ship Date: Feb 5, 2026 if ordered today
Pistons, KB Performance, 4.195 in. Bore, Step, 1.510 in. Compression Height, Press/Float Pin, 5/64 x 5/64 x 3/16 Ring Grooves, AMC, Set of 8
Part Number: UEM-KB420030
Not Yet Reviewed
Estimated Ship Date: Feb 5, 2026 if ordered today
Estimated Ship Date: Feb 5, 2026 if ordered today
Pistons, KB Performance, 4.160 in. Bore, Dome, 1.710 in. Compression Height, Press/Float Pin, 5/64 x 5/64 x 3/16 Ring Grooves, Pontiac, Set of 8
Part Number: UEM-KB422-040
Not Yet Reviewed
Estimated Ship Date: Feb 6, 2026 if ordered today
Estimated Ship Date: Feb 6, 2026 if ordered today
Pistons, KB Performance, 3.785 in. Bore, Dish, 1.353 in. Compression Height, Press/Float Pin, 5/64 x 5/64 x 3/16 Ring Grooves, Jeep, Set of 6
Part Number: UEM-KB424C-STD
Not Yet Reviewed
Estimated Ship Date: Jan 21, 2026 if ordered today
Estimated Ship Date: Jan 21, 2026 if ordered today
Pistons, KB Performance, 4.190 in. Bore, Flat, 1.490 in. Compression Height, Press/Float Pin, 5/64 x 1/16 x 3/16 Ring Grooves, Pontiac, Set of 8
Part Number: UEM-KB222-040
Not Yet Reviewed
Estimated Ship Date: Jan 26, 2026 if ordered today
Estimated Ship Date: Jan 26, 2026 if ordered today
Pistons, KB Performance, 3.845 in. Bore, Dish, 1.353 in. Compression Height, Press/Float Pin, 5/64 x 5/64 x 3/16 Ring Grooves, Jeep, Set of 6
Part Number: UEM-KB424C-060
Not Yet Reviewed
Estimated Ship Date: Jan 28, 2026 if ordered today
Estimated Ship Date: Jan 28, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.030 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9902HCKTM030
Estimated Ship Date: Today
Estimated Ship Date: Today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.030 in. Bore, Chevy, Kit
Part Number: UEM-9901HCKTM030
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.000 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9902HCKTMSTD
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.030 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9909HCKTM030
Estimated Ship Date: Today
Estimated Ship Date: Today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.060 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9909HCKTD060
Not Yet Reviewed
Estimated Ship Date: Feb 5, 2026 if ordered today
Estimated Ship Date: Feb 5, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.000 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9906HCKTMSTD
Not Yet Reviewed
Estimated Ship Date: Feb 9, 2026 if ordered today
Estimated Ship Date: Feb 9, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.030 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9909HCKTD030
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Piston and Ring Kit, Claimer, Hypereutectic, Dome, 4.030 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9905HCKTM030
Not Yet Reviewed
Estimated Ship Date: Feb 5, 2026 if ordered today
Estimated Ship Date: Feb 5, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Flat , 4.040 in. Bore, Chevy, Kit
Part Number: UEM-9901HCKTM040
Estimated Ship Date: Feb 5, 2026 if ordered today
Estimated Ship Date: Feb 5, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.125 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9911HCKTMSTD
Not Yet Reviewed
Estimated Ship Date: Feb 2, 2026 if ordered today
Estimated Ship Date: Feb 2, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.030 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9906HCKTM030
Not Yet Reviewed
Estimated Ship Date: Feb 5, 2026 if ordered today
Estimated Ship Date: Feb 5, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.155 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9911HCKTM030
Estimated Ship Date: Feb 6, 2026 if ordered today
Estimated Ship Date: Feb 6, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Dome, 4.000 in. Bore, Chevy, Kit
Part Number: UEM-9904HCKTMSTD
Not Yet Reviewed
Estimated Ship Date: Feb 9, 2026 if ordered today
Estimated Ship Date: Feb 9, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.165 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9911HCKTM040
Not Yet Reviewed
Estimated Ship Date: Feb 9, 2026 if ordered today
Estimated Ship Date: Feb 9, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.060 in. Bore, Chevy, Kit
Part Number: UEM-9901HCKTM060
Estimated Ship Date: Today
Estimated Ship Date: Today
Piston and Ring Kit, Claimer, Hypereutectic, Dish, 4.040 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9912HCKTM040
Not Yet Reviewed
Estimated Ship Date: Feb 5, 2026 if ordered today
Estimated Ship Date: Feb 5, 2026 if ordered today
Piston and Ring Kit, Claimer, Hypereutectic, Flat, 4.020 in. Bore, Chevy, Small Block, Kit
Part Number: UEM-9908HCKTM020
Not Yet Reviewed
Estimated Ship Date: Feb 6, 2026 if ordered today
Estimated Ship Date: Feb 6, 2026 if ordered today
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