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- 2020-2021 Polaris Sportsman 570 X2 back: 2020-2021
heat-treated
Two-way stretch knee and rear yoke panels for flexibility
2002-2006 Harley-Davidson FLSTFI Fat Boy - Notes: 2002-2004Will require high-lift valve springs
1 x Set screw
S&S Cycle 132" High Compression | 136" Big Bore Kit - 4.320" Bore - Black w/Highlighted Fins - M8 HELMET HOUSE - 2020-2021 Polaris Sportsman 570Features 132" high compression kit will work on 114" 117" motors with 4 1 2" stroke flywheels only To achieve 136" big bore, S&S flywheel with 4 5 8" stroke is required (sold seperately). Specs Product Name Big Bore Kit Type High Compression Color Finish Highlighted Fins Black Features +8. 5 cc Dome Volume Stroke Length 4 1 2" 4 5 8" Displacement 132" 136" Bore Size 4. 320" Units Kit Riding Style Street FITMENTS: 2025 Harley Davidson Softail Low Rider
