KB Performance Pistons

4.44 out of 5 stars 140 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

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KB Performance Pistons KB116.030

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: Tomorrow

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KB Performance Pistons KB116.STD

Pistons, Hypereutectic, Dome, 4.000 in. Bore, Ford, Set of 8

Part Number: UEM-KB116-STD

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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KB Performance Pistons KB115.030

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: Tomorrow

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KB Performance Pistons KB246.040

Pistons, Hypereutectic, Flat, 4.040 in. Bore, Ford, Set of 8

Part Number: UEM-KB246-040

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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KB Performance Pistons KB246.030

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

Part Number: UEM-KB246-030

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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KB Performance Pistons KB116.040

Pistons, Hypereutectic, Dome, 4.040 in. Bore, Ford, Set of 8

Part Number: UEM-KB116-040

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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KB Performance Pistons KB312.040

Pistons, Hypereutectic, Dome, 4.040 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB312-040

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

KB Performance Pistons KB365.030

Pistons, Hypereutectic, Dome, 4.030 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB365-030

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

KB Performance Pistons KB364.030

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

Part Number: UEM-KB364-030

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

KB Performance Pistons KB116.060

Pistons, Hypereutectic, Dome, 4.060 in. Bore, Ford, Each

Part Number: UEM-KB116-060

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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KB Performance Pistons KB115.STD

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

Part Number: UEM-KB115-STD

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

KB Performance Pistons KB115.040

Pistons, Hypereutectic, Flat, 4.040 in. Bore, Ford, Set of 8

Part Number: UEM-KB115-040

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

KB Performance Pistons KB246.STD

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

Part Number: UEM-KB246-STD

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

KB Performance Pistons KB364.020

Pistons, Hypereutectic, Dish, 4.020 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB364-020

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

KB Performance Pistons KB115.020

Pistons, Hypereutectic, Flat, 4.020 in. Bore, Ford, Set of 8

Part Number: UEM-KB115-020

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

KB Performance Pistons SKB366.040

Piston, Hypereutectic, Step Dish, 4.040 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Ford, Each

Part Number: UEM-SKB366-040

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

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KB Performance Pistons KB192.040

Pistons, Hypereutectic, Dish, 4.040 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB192-040

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

KB Performance Pistons KB364.060

Pistons, Hypereutectic, Dish, 4.060 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB364-060

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

KB Performance Pistons KB246.020

Pistons, Hypereutectic, Flat, 4.020 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB246-020

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

KB Performance Pistons KB281.040

Pistons, Hypereutectic, Flat, 4.040 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB281-040

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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KB Performance Pistons KB355.020

Pistons, Hypereutectic, Dish, 4.020 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB355-020

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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KB Performance Pistons KB365.060

Pistons, Hypereutectic, Dome, 4.060 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB365-060

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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KB Performance Pistons SKB365.030

Piston, Hypereutectic, Dome, 4.030 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Ford, Each

Part Number: UEM-SKB365-030

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

Call to Order

KB Performance Pistons SKB355.020

Piston, Hypereutectic, Dish, 4.020 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Ford, Each

Part Number: UEM-SKB355-020

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

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KB Performance Pistons SKB311.STD

Piston, Hypereutectic, Flat, 4.000 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Ford, Each

Part Number: UEM-SKB311-STD

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

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