S&S Cycle
S&S Cycle 99-06 Twin Cam 88 A Engines 4-1/8in Bore Stock Stud Pattern Crankcase - Wrinkle Black
S&S Cycle 99-06 Twin Cam 88 A Engines 4-1/8in Bore Stock Stud Pattern Crankcase - Wrinkle Black
In Stock
Available to Order
Available on Stock Order
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If you find a lower price at an eligible UK retailer website, we will match it.
Fitting service at Xatrix, West Yorkshire
We can offer a fitting service for this part. Contact us for a fitting quote.
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.
Genuine S&S Cycle. Part number 31-0181A.
Ships from US warehouse.
Note: Not CARB approved — not for sale or use on pollution-controlled vehicles in California.

Price Match Request
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Price Match Guarantee
We are committed to giving you the best price. if you find a lower price on the same item at an eligible UK retailer website, we will match it.
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Next Day UK Delivery
For in-stock item, get guaranteed next day UK delivery. Same day dispatch available on in-stock items if your order is placed before 1pm UK Time.
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Worldwide Shipping
We ship worldwide via DHL International, simply enter your full address at checkout to see the shipping option(s) and quote(s). Same day dispatch available if your order is placed before 1pm UK Time on all in stock items!
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