KB Performance V-Twin Piston and Ring Kits

Piston and Ring Kit, Forged, 3.905 in. Bore, Harley-Davidson®, 9.25:1 Compression Ratio, Kit

Part Number: UEM-KB904C-030

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Piston and Ring Kit, Hypereutectic, 3.518 in. Bore, Cast Iron Rings, Harley-Davidson®, Kit

Part Number: UEM-KB305-020

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Piston and Ring Kit, Hypereutectic, 3.538 in. Bore, Cast Iron Rings, Harley-Davidson®, Kit

Part Number: UEM-KB305-040

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Piston and Ring Kit, Hypereutectic, 3.508 in. Bore, Harley-Davidson®, 8.80:1 Compression Ratio, Kit

Part Number: UEM-KB410-010

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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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Piston and Ring Kit, Hypereutectic, 3.538 in. Bore, Harley-Davidson®, 8.80:1 Compression Ratio, Kit

Part Number: UEM-KB410-040

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

Part Number: UEM-KB348-020

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Powersports Piston, Forged 4032 Alloy, Coated, 3.915 in. Bore, 1.086 in. Comp. Ht, Dome, -5.4cc, 0.040 in. Oversize, 0.927 in. Pin, Harley®, Set

Part Number: UEM-KB909C-040

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Piston and Ring Kit, Forged, 4.020 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB914C-020

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

Part Number: UEM-KB924C-STD

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Powersports Piston, Forged 4032 Alloy, Coated, 3.467 in. Bore, 1.450 in. Comp. Ht, Hemi Dome, -47.6cc, 0.030 in. Oversize, 0.791 in. Pin, Harley®, Set

Part Number: UEM-KB931C030

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PISTON KIT

Part Number: UEM-KB935C-020

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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 6, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.498 in. Bore, Harley-Davidson®, 9.10;1 Compression Ratio, Kit

Part Number: UEM-KB264-STD

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Piston and Ring Kit, Hypereutectic, 3.538 in. Bore, Harley-Davidson®, 7.20;1 Compression Ratio, Kit

Part Number: UEM-KB288-040

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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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Piston and Ring Kit, Hypereutectic, 3.885 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB409C-010

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

Part Number: UEM-KB409C-020

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Piston and Ring Kit, Hypereutectic, 3.528 in. Bore, Harley-Davidson®, 8.80:1 Compression Ratio, Kit

Part Number: UEM-KB410-030

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Piston and Ring Kit, Forged, 3.885 in. Bore, Harley-Davidson®, 9.25:1 Compression Ratio, Kit

Part Number: UEM-KB904C-010

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Piston and Ring Kit, Forged, 3.900 in. Bore, Harley-Davidson®, 10.50:1 Compression Ratio, Kit

Part Number: UEM-KB906C-020

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