Crankcase Assembly with 3-1/2in. Bore - Natural. Fits Big Twin 1984-1991 - S&S Brake Upgrades - Front * Utilization of the factory

* Utilization of the factory dual cable throttle system ensures safer operation

1 x MS-AS3521

* Fits XL1200C Sportster 1200 Custom 2011-2015

030 Head Gaskets are not to be used in Stage 6 S&S kits

but not necessarily the stock performance

Crankcase Assembly with 3-1/2in. Bore - Natural. Fits Big Twin 1984-1991 - S&S Brake Upgrades - Front * Utilization of the factoryFeatures & Benefits: * Natural Aluminium Finish. * Perfect for stock replacement & 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. * Relocated cam chest oil pick up increases gear case scavenging & virtually eliminates oil carry over at