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KB Performance Pistons

4.45 out of 5 stars 136 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.

Showing All Customizable Items, Including Not in Stock Items

Results 1 - 25 of 483

Piston, Hypereutectic, Dome, 4.000 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB105-STD

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Flat, 4.030 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB120-030

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Estimated Ship Date: Apr 13, 2026 if ordered today

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Estimated Ship Date: Apr 13, 2026 if ordered today

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

Part Number: UEM-SKB359-030

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.165 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB361-040

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.185 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB361-060

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.125 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB361-STD

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.185 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB375L-060

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.185 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB375R-060

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.280 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB207-030

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.290 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB207-040

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.310 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB207-060

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.030 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, GM, V6, V8, Each

Part Number: UEM-SKB213L-030

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.030 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, GM, V6, V8, Each

Part Number: UEM-SKB213R-030

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Flat, 4.290 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB224-040

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Flat, 3.776 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB226-040

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Flat, 3.736 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB226-STD

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.280 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB227-030

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Flat, 4.030 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, GM, V6, V8, Each

Part Number: UEM-SKB228-030

Not Yet Reviewed

Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Flat, 3.756 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB229-020

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Flat, 3.796 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB229-060

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Flat, 4.040 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB100-040

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

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

Part Number: UEM-SKB101-040

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dish, 4.030 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB102-030

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

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

Part Number: UEM-SKB102-040

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Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Piston, Hypereutectic, Dome, 4.040 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Chevy, Each

Part Number: UEM-SKB105-040

Not Yet Reviewed

Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today