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9:1 Compression Ratio with S&S 89cc Heads # SS106-4270
* Swaged taper to 1" for stock controls
* Lock plate bolts not included
Spacers & Gromments
Side release buckles sewn on top of lid allow for additional attachments
1200cc Big Bore Kit - Silver. Fits Sportster 1986-2021 with 883cc Engine. SS90-9510 9:1 Compression Ratio with S&SFeatures & Benefits: * Will Not Fit XR1200 * Includes silver cylinders. * Includes MLS Head Gaskets, Base Gaskets & Exhaust Gaskets. * Includes assembly lube & instructions. * No machining & No rebalancing. * No cylinder head modifications. * The dished piston dome keeps compression down to a streetable 9. 4: 1 with stock 883cc heads. Tech Tip: * For the best performance CNC head porting, performance cams, exhaust & intake upgrades are recommended *
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