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KB Performance Pistons

4.45 out of 5 stars 137 Customer Reviews

KB Performance hypereutectic pistons are made from 390 aluminum alloy and heat-treated to T6 standards, which makes them 30 percent stronger than ordinary untreated
KB Performance hypereutectic pistons are made from 390 aluminum alloy and heat-treated to T6 standards, which makes them 30 percent stronger than ordinary untreated hypereutectics. Their 100 percent CNC-machined crowns, high upper compression-ring location, gas-accumulator groove, drilled oil returns, and spiral-lock retainer grooves make these pistons outstanding for performance applications. They have a lightweight, rigid-rib skirt design that stabilizes the piston in the bore. All of this adds up to pistons that fit tighter than forged types, provide improved oil control, reduce blow-by, increase ring life, elimin
KB Performance hypereutectic pistons are made from 390 aluminum alloy and heat-treated to T6 standards, which makes them 30 percent stronger than ordinary untreated hypereutectics. Their 100 percent CNC-machined crowns, high upper compression-ring location, gas-accumulator groove, drilled oil returns, and spiral-lock retainer grooves make these pistons outstanding for performance applications. They have a lightweight, rigid-rib skirt design that stabilizes the piston in the bore. All of this adds up to pistons that fit tighter than forged types, provide improved oil control, reduce blow-by, increase ring life, eliminate cold start-up knocking, and won't cost you an arm and a leg! Thousands of models are available—find the set and options designed for your vehicle and engine application.

Results 1 - 25 of 921

Pistons, Hypereutectic, Dome, 4.280 in. Bore, Chrysler, Set of 8

Part Number: UEM-KB400-030

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Flat, 4.000 in. Bore, Chrysler, Set of 8

Part Number: UEM-KB107-STD

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Flat, 4.070 in. Bore, Dodge, Plymouth, Set of 8

Part Number: UEM-KB243-030

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Dome, 4.155 in. Bore, Set of 8

Part Number: UEM-KB160-030

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Flat, 4.030 in. Bore, Chevy, Set of 8

Part Number: UEM-KB120-030

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Flat, 4.280 in. Bore, Chrysler, Dodge, Jensen, Plymouth, Set of 8

Part Number: UEM-KB162-030

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Flat, 4.030 in. Bore, Ford, Set of 8

Part Number: UEM-KB115-030

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Dome, 4.060 in. Bore, Chevy, Set of 8

Part Number: UEM-KB157-060

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Flat, 4.040 in. Bore, Chrysler, Dodge, Plymouth, Set of 8

Part Number: UEM-KB107-040

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Dome, 4.030 in. Bore, Ford, Set of 8

Part Number: UEM-KB116-030

5.0 out of 5 stars ( 8 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, KB Performance Pistons, Hypereutectic Aluminum, 0.030 in. Oversize, Pontiac, 400, Set of 8

Part Number: UEM-KB422-030

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Flat, 3.940 in. Bore, Chrysler, Dodge, Plymouth, Set of 8

Part Number: UEM-KB167-030

1.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Flat, 4.030 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB151-030

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Flat, 4.000 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB151-STD

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Dome with 2 Valve Reliefs, 4.040 in. Bore, w/Wrist Pins/Retainers, for 3.250 in. Stroke/5.700 in. Rods, Chevy, 327, Set of 8

Part Number: UEM-KB157-040

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Dish, 4.030 in. Bore, Chevy, Set of 8

Part Number: UEM-KB193-030

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Dome, 4.125 in. Bore, Chevy, Set of 8

Part Number: UEM-KB160-STD

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Dome, 4.165 in. Bore, Chevy, Set of 8

Part Number: UEM-KB160-040

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Dome, 4.280 in. Bore, Chevy, Set of 8

Part Number: UEM-KB227-030

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Dome, 4.185 in. Bore, Chevy, Set of 8

Part Number: UEM-KB160-060

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Dish, 4.150 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Pontiac, Set of 8

Part Number: UEM-KB346-030

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Pistons, Hypereutectic, Flat, 4.030 in. Bore, Chrysler, Set of 8

Part Number: UEM-KB107-030

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

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-KB207-STD

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Pistons, Hypereutectic, Flat, 3.905 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Set of 8

Part Number: UEM-KB165-030

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

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: Dec 30, 2025 if ordered today

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Estimated Ship Date: Dec 30, 2025 if ordered today

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