1200cc Big Bore Kit – Wrinkle Black. Fits Sportster 1986-2021 with 883cc Engine.

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Features & Benefits:-

* Includes Black Cylinders.

* Includes MLS Head Gaskets, Base Gaskets & Exhaust Gaskets.

* Includes Assembly lube & Instructions.

* No machining & No re-balancing.

* 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.

* EFI re-tuning is required.

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