Description
Wiseco piston ring sets are engineered to maintain proper compression and blow-by control in high-performance applications. If you’re running Wiseco pistons in your 2018-2021 Harley-Davidson Softail Street Bob, this 4.125-inch ring set ensures optimal sealing and prevents power loss from gas leakage past the piston. Proper ring-to-piston fitment is critical for consistent performance, longevity, and reliable operation across varying load conditions.
- Bore diameter: 4.125 inches
- Fitment: Harley-Davidson Softail Street Bob 2018-2021
- Compatible: Wiseco pistons only
- Material: High-temp alloy steel
- Design: Precision-engineered rings
- Function: Enhanced compression sealing
- Installation: Bolt-on replacement
- Withstands: High combustion temperatures
- Benefit: Reduced blow-by loss
- MPN: 4125VMF
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