Description
Worn piston rings kill compression and bleed horsepower—the Wiseco 3537X restores both with precision-engineered sealing that reduces blow-by and friction. Built from high-strength materials and validated through rigorous testing, this ring set delivers the reliability you need whether you’re cruising on the street or pushing hard at the strip. Drop-in replacement for your classic or modern Big Twin, no machine work required.
- Bore diameter: 3.538 inches
- Fits: 1984-1999 Harley-Davidson FLH, FLHT, FLST, FXST
- Material: High-strength alloy
- Design: Precision-engineered rings
- Sealing: Enhanced blow-by reduction
- Friction: Optimized for efficiency
- Installation: Bolt-on replacement
- Applications: Street and racing
- MPN: 3537X
- Manufacturer: Wiseco









