S&S CYCLE Engine Case BORE SIZE 4.125" For Twin Cam 88® A Engines 31-0181A

• Replacement Twin Cam "A" engine cases for stock H-D chassis only (carb and EFI)
• Feature greater overall strength than stock crankcases
• Strong, dependable Timken®-style sprocket shaft bearings
• Clearanced for strokes up to and including 5"
• All passages between the crankcase cam support plate are O-ring sealed
• Compatible with most stock components
• Cam chest has clearance for up to .675" lift cams
• Include S&S crankcase breather reed valve designed to eliminate oil carry-over and oil scavenging problems
• Rear motor mount bolts directly to the stock transmission; fully compatible with the stock primary, charging system, and other stock components
• Made in the U.S.A. 

• BORE SIZE

  4.125"

• This project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications.

Part Notes