This billet oil filter mounting bracket can solve a common problem for engine builders and custom bike builders alike. It fits any generator engine with 5/16" generator mounting holes, and it replaces the hard to find oil filter bracket for 1986-1990 Harley-Davidson Sportster models. This part is needed for any engine build with S&S crankcases for Sportster or Buell motorcycles, including the S&S SB-Series engines. On a generator style Big Twin engine the filter bracket bolts to the generator mounting pad in place of the generator. This is a must for alternator/generator engines that use an alternator charging system, or straight generator engines with magneto ignitions and no charging system. The oil filter bracket seals off the cam chest and provides a convenient place too for a spin on oil filter. The bracket is machined for easy routing of an oil cooler in all applications, and accepts the stock oil pressure sending switch on Sportster models.