The stem is 4" long with 8mm x 1

Make sure you have an S&S oil filter working for you

Want to slim down your front end for that classic chopper look while still using your stock fork legs

These bolt from your motor to a stock tab on your frame

BSA or Norton motorcycle

Oil Filter - Chrome - Harley-Davidson Evolution Big Twin Harley and Sportster Models - K&N Part #KN-170C Subcategory_Engine Mounts The stem is 4" longTired of wrestling with stuck oil filters during an oil change? This premium oil filter from K&N, a brand you can trust, not only provides superior engine protection but also features a built in hex nut for incredibly easy removal. Easy Wrench Off Removal: A 17mm hex nut is welded to the bottom of the canister, allowing for simple, fast removal with a standard wrench. The nut is also pre drilled for safety wire security. Superior Filtration: K&N uses