KB Performance V-Twin Piston and Ring Kits

Piston and Ring Kit, Forged, 4.130 in. Bore, Harley-Davidson®, 9.50:1 Compression Ratio, Kit

Part Number: UEM-KB910C-005

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.518 in. Bore, Harley-Davidson®, 8.80:1 Compression Ratio, Kit

Part Number: UEM-KB410-020

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Forged, 4.145 in. Bore, Harley-Davidson®, 9.50:1 Compression Ratio, Kit

Part Number: UEM-KB910C-020

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Forged, 3.910 in. Bore, Harley-Davidson®, 10.50:1 Compression Ratio, Kit

Part Number: UEM-KB906C-030

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Forged, 3.528 in. Bore, Harley-Davidson®, 9.00:1 Compression Ratio, Kit

Part Number: UEM-KB923C-030

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Forged, 4.005 in. Bore, Harley-Davidson®, 9.50:1 Compression Ratio, Kit

Part Number: UEM-KB913C-005

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, Dish, 3.528 in. Bore, Harley-Davidson®, V2, Kit

Part Number: UEM-KB272-030

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Forged, 4.130 in. Bore, Harley-Davidson®, 9.50:1 Compression Ratio, Kit

Part Number: UEM-KB916C-005

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.880 in. Bore, Harley-Davidson®, Kit

Part Number: UEM-KB348-005

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.875 in. Bore, Indian, 9.80:1 Compression Ratio, Kit

Part Number: UEM-KB412-STD

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.528 in. Bore, Harley-Davidson®, 10.00;1 Compression Ratio, Kit

Part Number: UEM-KB272-040

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston Set, KB Forged Coated Piston - Knuckle Pan Shovel Hemi Dome -47.6cc 74ci FL, FLH, FX 1941-79

Part Number: UEM-KB931C005

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Forged, 3.905 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB905C-030

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Forged, 4.135 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB917C-010

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.538 in. Bore, Harley-Davidson®, 8.60;1 Compression Ratio, Kit

Part Number: UEM-KB258-040

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Estimated Ship Date: Apr 21, 2026 if ordered today

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

Part Number: UEM-KB912C-020

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston Set, KB Forged Coated Piston - Shovelhead Hemi Dome -58.2cc 88-98ci 1948-84 ROD -7.440

Part Number: UEM-KB930C030

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.503 in. Bore, Harley-Davidson®, 8.30:1 Compression Ratio, Kit

Part Number: UEM-KB297-005

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Forged, 4.135 in. Bore, Harley-Davidson®, 10.50:1 Compression Ratio, Kit

Part Number: UEM-KB918C-010

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.518 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB414-020

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Forged, 3.508 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB924C-010

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.880 in. Bore, Indian, 9.80:1 Compression Ratio, Kit

Part Number: UEM-KB412-005

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Estimated Ship Date: Apr 20, 2026 if ordered today

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PISTON SET OF 2

Part Number: UEM-KB661C-STD

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Estimated Ship Date: Apr 20, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.528 in. Bore, Harley-Davidson®, 8.60;1 Compression Ratio, Kit

Part Number: UEM-KB258-030

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Estimated Ship Date: Apr 20, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.508 in. Bore, Harley-Davidson®, 8.30:1 Compression Ratio, Kit

Part Number: UEM-KB297-010

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Estimated Ship Date: Apr 20, 2026 if ordered today

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