Champion Rainbow Co. Ltd (Previously Golden Bloom)
MMX O-Ring Service Kit for MMX B58 Oil Filter and Housing
MMX O-Ring Service Kit for MMX B58 Oil Filter and Housing
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Refresh the seals on your MMR Performance lifetime filter and billet cap with this dedicated sealing ring service pack. Keep your BMW B58 lubrication system tight, leak free and performing as intended with a complete set of four replacement sealing rings engineered for the MMR reusable filter assembly. Ideal for preventative maintenance, pressure retention and long term reliability on tuned and daily driven cars alike.
We run this kit in-house on our own builds and customer vehicles, and feedback has been consistently excellent. Fresh seals stop weeping, preserve oil pressure stability and help prevent the well known B58 filter element collapse issue when used with the correct MMR hardware.
- Complete refresh kit – 4 x replacement sealing rings for the MMR reusable filter assembly
- Exact-match dimensions to the original MMR seals for a precise, worry free swap
- Optimised for repeated maintenance on the MMR lifetime filter system
- Supports clean servicing practices and consistent clamping force at the cap
- Perfect for high performance B58 applications where sealing integrity matters
Compatibility
This seal pack is designed only for the MMR Performance lifetime filter system and matching billet cover. Compatible filter part number: MMR17-1502.
Platform suitability includes BMW B58 applications and selected B57 where the above MMR filter and billet cover are installed. Examples include many M140i, M240i, 340i, 440i, 540i, 740i, X3 M40i, X4 M40i, Z4 M40i and GR Supra A90 that are running the MMR17-1502 filter and MMR billet cap.
What is included
- 4 x replacement sealing rings for the MMR lifetime filter and billet cover assembly
Please note: seals only. No cartridge, no billet cover and no additional hardware are included.
When to replace
Swap the seal set at regular service intervals whenever you clean or refit your MMR lifetime filter to maintain optimal sealing and long term reliability.
Professional fitting
Want it installed properly first time Our workshop can help. Book fitting with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.
Why choose this kit
- Purpose made for the MMR reusable filter and billet cover assembly
- Helps prevent leaks, pressure loss and maintenance headaches
- Trusted by our team and our customers on performance road and track cars
Search terms our customers use: BMW B58 seal kit, engine filter cap seals, billet cover gasket set, B58 housing seal pack, MMR filter rebuild kit, reusable filter service seals, BMW performance parts UK, B58 maintenance kit, replacement sealing rings for MMR17-1502, MMR billet cap seals.
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