S&S CYCLE Engine Case - 4.125" Bore w/Stock Stud Pattern - 88A Engine Type - Wrinkle Black - Twin Cam 31-0181A Motorcycle Tires - Off Road with improved low and midrange

with improved low and midrange torque

drive gear

Big-bore bolt-on kit increases 114"/117" with 4-1/2" stroke M-Eight to 128" with no case machining required

Debris screen in both scavenge pickups

A hydraulic press and other professional level tools are required to install

S&S CYCLE Engine Case - 4.125" Bore w/Stock Stud Pattern - 88A Engine Type - Wrinkle Black - Twin Cam 31-0181A Motorcycle Tires - Off Road with improved low and midrangeEngine Case 4. 125" Bore w Stock Stud Pattern 88A Engine Type Wrinkle Black Twin Cam Replacement Twin Cam "A" engine cases for stock H D chassis only (carb and EFI), Features greater overall strength than stock crankcases, Strong, dependable Timken? style sprocket shaft bearings, All passages between the crankcase cam support plate are O ring sealed, Compatible with most stock components, Includes S&S crankcase breather reed valve designed to