Big Bore Kits for the 2021 Softail Slim
5 verified-fit parts, each checked against the 2021 Softail Slim specifically. Lowest price first.
- Fuel MotoSP 124" Piston & Cylinder Big Bore Kit (107" Engines)$899.95
- Fuel MotoM8 124" Piston & Cylinder Kit (107" Engines)$1,199.95
- Fuel Moto129" Big Bore Kit Outlaw - M8 (107")$1,499.95
- Zippers PerformanceZipper's M8 124" Cylinder Kit, -5.5cc Dished Pistons⚠ Has fit notes · ⚠ Race/closed-course product$1,529.00
- Zippers PerformanceZipper's M8 124" Cylinder Kit, Flat-Top (0cc) Pistons⚠ Has fit notes · ⚠ Race/closed-course product$1,529.00
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