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KB Performance V-Twin Piston and Ring Kits

4.8 out of 5 stars 20 Customer Reviews

KB Performance V-Twin piston and ring kits bring all of the knowledge and experience of a legendary engine builder to the world of high performance motorcycles. These pistons use the latest manufacturing techniques and standards to ensure quality and maximum available performance. The kits are offered in hypereutectic 390 alloy and forged 4032 low-expansion alloy. KB Performance V-Twin piston and ring kits are available for Harley-Davidson® and Indian motorcycles in a variety of engine sizes and compression ratios.

Results 1 - 25 of 168

Piston and Ring Kit, Forged, Dome, 3.875 in. Bore, Harley-Davidson®, V2, Kit

Part Number: UEM-KB905C-STD

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.498 in. Bore, Harley-Davidson®, 10.00;1 Compression Ratio, Kit

Part Number: UEM-KB272-STD

5.0 out of 5 stars ( 1 )

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.503 in. Bore, Harley-Davidson®, 8.60;1 Compression Ratio, Kit

Part Number: UEM-KB258-005

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Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

PISTON SET OF 2

Part Number: UEM-KB661C-STD

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Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.518 in. Bore, Harley-Davidson®, 8.90:1 Compression Ratio, Kit

Part Number: UEM-KB295-020

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Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.635 in. Bore, Harley-Davidson®, 10.50;1 Compression Ratio, Kit

Part Number: UEM-KB294-010

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.875 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB409C-STD

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Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Forged, 4.125 in. Bore, Harley-Davidson®, 10.50:1 Compression Ratio, Kit

Part Number: UEM-KB918C-STD

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Forged, 4.000 in. Bore, Harley-Davidson®, 10.50:1 Compression Ratio, Kit

Part Number: UEM-KB915C-STD

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Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.228 in. Bore, Harley-Davidson®, 8.20;1 Compression Ratio, Kit

Part Number: UEM-KB292-040

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Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.508 in. Bore, Cast Iron Rings, Harley-Davidson®, Kit

Part Number: UEM-KB305-010

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Piston and Ring Kit, Hypereutectic, 3.538 in. Bore, Harley-Davidson®, 8.30:1 Compression Ratio, Kit

Part Number: UEM-KB297-040

5.0 out of 5 stars ( 1 )

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.507 in. Bore, Harley-Davidson®, 7.80;1 Compression Ratio, Kit

Part Number: UEM-KB263-080

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.447 in. Bore, Harley-Davidson®, 7.80;1 Compression Ratio, Kit

Part Number: UEM-KB263-010

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Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Forged, 3.895 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB908C-020

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Forged, 4.145 in. Bore, Harley-Davidson®, 10.50:1 Compression Ratio, Kit

Part Number: UEM-KB918C-020

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Forged, 4.135 in. Bore, Harley-Davidson®, 9.50:1 Compression Ratio, Kit

Part Number: UEM-KB916C-010

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Forged, 3.875 in. Bore, Harley-Davidson®, 9.25:1 Compression Ratio, Kit

Part Number: UEM-KB904C-STD

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Forged, 3.880 in. Bore, Harley-Davidson®, 10.50:1 Compression Ratio, Kit

Part Number: UEM-KB909C-005

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Forged, 3.915 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB908C-040

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston Set, KB Forged Piston - Twin Cam 96 Big Bore Dome -4.2cc (110ci) 2007 To Present Rod -7.667 w/Screamin' Eagle head

Part Number: UEM-KB661C010

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Forged, 3.518 in. Bore, Harley-Davidson®, 10.50:1 Compression Ratio, Kit

Part Number: UEM-KB925C-020

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Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.895 in. Bore, Harley-Davidson®, 9.30:1 Compression Ratio, Kit

Part Number: UEM-KB348-020

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.645 in. Bore, Harley-Davidson®, 10.50;1 Compression Ratio, Kit

Part Number: UEM-KB294-020

4.0 out of 5 stars ( 1 )

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today

Piston and Ring Kit, Hypereutectic, 3.885 in. Bore, Harley-Davidson®, 9.30:1 Compression Ratio, Kit

Part Number: UEM-KB348-010

Not Yet Reviewed

Estimated Ship Date: May 26, 2026 if ordered today

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Estimated Ship Date: May 26, 2026 if ordered today