S&S CYCLE Crankcase for '99–'06 HD® Twin Cam 88® A Engines (except 2006 HD® Dyna®), 4-1/8" Bore, Stock Stud Pattern - Wrinkle Black - 31-0181A

This 4-1/8" wrinkle black, stock stud pattern crankcase for 1999–'06 HD® Twin Cam 88®A engines (except 2006 HD® Dyna®) is much stronger than stock crankcases in every aspect. It has an extra large front motor mount for increased strength. The large cam chest allows cam lift up to .675" without clearancing, Timken® style sprocket shaft bearings withstand the most demanding applications. The S&S crankcase breather reed valve eliminates oil carry-over and oil scavenging problems. Clearanced for strokes up to 5". All passages between the crankcase and the cam support plate are o-ring sealed. Kit includes S&S crankcase, S&S breather reed valve, pinion and Timken® bearing and hardware.

• 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.
• This project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications.
  
   NOTE: For Twin Cam 88 A Engines
  

Fitment Guide

Specs