HARLEY-DAVIDSON FLSTF FAT BOY Engines & Components

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

Part Number: UEM-KB918C-020

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Estimated Ship Date: Jun 1, 2026 if ordered today

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

Part Number: UEM-KB908C-020

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

Part Number: UEM-KB348-010

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Valve Spring and Retainer Kits, Beehive Springs, 0.310 in. Stem, 10 Degree Titanium Locks, Retainers, Spring Seats, Harley-Davidson®, Big Twin, Kit

Part Number: CCA-9705-KIT

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Piston Set, KB Hyper Twin Cam 88 (88ci) 1998-2006 Rod-7.667 Bore-3.750 Stroke-4.000 C.H. 1.270 Flat Top +1cc

Part Number: UEM-KB425C010

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Oil Filter, Spin-On, Black, Buell, Harley-Davidson®, Set of 12

Part Number: SSY-310-0239

4.0 out of 5 stars ( 1 )

Estimated Ship Date: May 14, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.498 in. Bore, Cast Iron Rings, Harley-Davidson®, Kit

Part Number: UEM-KB305-STD

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jun 1, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.503 in. Bore, Harley-Davidson®, 10.50;1 Compression Ratio, Kit

Part Number: UEM-KB266-005

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Piston and Ring Kit, Hypereutectic, 3.880 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB409C-005

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Oil Filter and Voltage Regulator Mounts, Billet Aluminum Bracket, Chrome Plated, Harley-Davidson®, Kit

Part Number: AIX-RM2141-C

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Estimated Ship Date: May 18, 2026 if ordered today

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Oil Filter and Voltage Regulator Mounts, Billet Aluminum Bracket, Polished, Harley-Davidson®, Kit

Part Number: AIX-RM2141-P

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Estimated Ship Date: May 18, 2026 if ordered today

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Powersports Valvetrain Kit, Valve Spring Kit, Beehive, H. T. Steel Retainers, .610" Lift

Part Number: KPM-20-21400

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Valve Springs, Retainers, Locks, Dual, Steel Retainers, 0.600 in. Maximum Lift, Buell, Harley-Davidson®, Kit

Part Number: KPM-20-20364

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Piston and Ring Kit, Forged, 3.895 in. Bore, Harley-Davidson®, 10.50:1 Compression Ratio, Kit

Part Number: UEM-KB909C-020

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Piston and Ring Kit, Forged, 4.000 in. Bore, Harley-Davidson®, 9.50:1 Compression Ratio, Kit

Part Number: UEM-KB913C-STD

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Overflow Tank, Bluegrass Breather, 20cc Capacity, Round, Steel, Chrome, Harley-Davidson®, Kit

Part Number: KUR-9930

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Estimated Ship Date: May 18, 2026 if ordered today

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Piston and Ring Kit, Hypereutectic, 3.905 in. Bore, Harley-Davidson®, 9.30:1 Compression Ratio, Kit

Part Number: UEM-KB348-030

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Piston and Ring Kit, Hypereutectic, 3.518 in. Bore, Harley-Davidson®, 8.60;1 Compression Ratio, Kit

Part Number: UEM-KB258-020

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

Part Number: UEM-KB409C-040

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Piston and Ring Kit, Forged, Dome, 3.885 in. Bore, Harley-Davidson®, V2, Kit

Part Number: UEM-KB906C-010

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Piston and Ring Kit, Forged, 3.880 in. Bore, Harley-Davidson®, 9.50:1 Compression Ratio, Kit

Part Number: UEM-KB907C-005

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Jun 1, 2026 if ordered today

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Piston and Ring Kit, Forged, 4.000 in. Bore, Harley-Davidson®, 10.00:1 Compression Ratio, Kit

Part Number: UEM-KB914C-STD

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

Part Number: UEM-KB905C-040

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Piston and Ring Kit, Forged, 3.915 in. Bore, Harley-Davidson®, 9.25:1 Compression Ratio, Kit

Part Number: UEM-KB904C-040

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Estimated Ship Date: Jun 1, 2026 if ordered today

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