1200cc Big Bore Kit - Silver. Fits Sportster 1986-2021 with 883cc Engine. - S&S Front & Rear End Hardware * Intergrated clamp design replaces

* Intergrated clamp design replaces stock riser clamp and hardware

* Optional Chicane™ Throttle Wing sold separately

* Sold in pairs with top clamp and ARP Top Hardware

* 8 HP and 10 TQ increase over stock

* These are exact reproduction of the O

1200cc Big Bore Kit - Silver. Fits Sportster 1986-2021 with 883cc Engine. - S&S Front & Rear End Hardware * Intergrated clamp design replacesFeatures & 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 *