MMX O-Ring Service Kit for MMX B58 Oil Filter and Housing - MMR17-0000 - Genuine MMR Performance O-Ring service kit for the MMR Performance oil filter and billet housing. Does not include the MMR oil filter or billet housing, only the four O-Rings needed to service our reusable filter. The MMR Performance oil filter and housing contains four O-Rings within the kit. We recommend you replace the O-Ring set on a regular basis when changing or cleaning the MMR filter, in order to maintain the integrity of the sealing properties it was designed to provide. As it's a direct replacement with the original O-Ring set supplied, it's a very straightforward process to swap and replace. Fitment is limited to the MMR Performance lifetime oil filter only (MMR17-1502) to protect against the notorious B58 oil filter collapse. Model variant Fitment is limited to the MMR Performance oil filter (MMR17-1502) to protect against the notorious B58 oil filter collapse.