S&S Cycle 84-91 BT w/ 3-5/8in Bore Super Stock Alternator Style Crankcase - Natural

Perfect for stock replacement and high performance applications, these crankcases offer some unique features. Besides being machined for a crank position sensor, they are also compatible with stock flywheel assemblies, primary covers, gearcovers and are clearanced for 38 amp alternator stators.

• Compatible with stock 1984-'99 flywheel assemblies, primary covers, gearcovers, and clearanced for 38 amp alternator stators, making them perfect for stock replacement or high performance applications
• A ported breather passageway and a machined breather window allows the air/oil mist to flow from the flywheel cavity to the cam chest of the engine with the least possible restriction
• Machined for installation of a crank position sensor allowing the cases to be used in stock EFI applications and allows easy installation of S&S IST® Ignition and VFI Fuel Injection.
• Crankcase venting can be achieved via two crankcase breathers, the cylinder heads, or both. We recommend using both crankcase breathers in engines larger than 95"
• Relocated cam chest oil pick-up increases gear case scavenging and virtually eliminates oil carry-over at sustained high speeds
• Machined to accept the stock oil filter assembly used on 1984-'91 big twins
• Clearanced for strokes as long as 5"