Skip to product information
MMX Performance BMW S58/B48E billet oil filler cap for performance engines, shown in close-up with engraved branding.
  • MMX Performance BMW S58/B48E billet oil filler cap for performance engines, shown in close-up with engraved branding.
  • MMX Performance BMW S58/B48E billet oil filler cap, durable aluminum, precision-machined, for enhanced engine performance and style.
  • MMX Performance BMW billet oil filler cap for S58 and B48E engines, featuring a sleek, durable design for performance cars.
  • MMX Performance BMW billet oil filler cap for S58 and B48E engines, made of polished metal with brand logo.
  • MMX Performance BMW S58/B48E billet oil filler cap, high-performance engine component with sleek metal finish.
  • MMX Performance BMW billet oil filler cap for S58 and B48E engines, made of polished metal with engraved branding.
  • MMX Performance BMW S58/B48E billet oil filler cap with sleek design and precision craftsmanship for high-performance engine maintenance.
  • MMX Performance BMW S58/B48E billet oil filler cap, sleek metal design for engine enhancement and aesthetics.
MMX Performance BMW Billet Oil Filler Cap - S58 / B48E

MMX Performance BMW Billet Oil Filler Cap - S58 / B48E

8 IN STOCK

SKU: MMR03-1601
$127.70

The MMX Performance BMW Billet Oil Filler Cap for S58 and B48E engines is a precision-engineered upgrade designed to enhance both durability and under-hood aesthetics. Unlike simple cap covers, this is a complete replacement unit, machined from a solid piece of billet aluminum to deliver long-term reliability and a refined OEM+ appearance.

Developed in the UK, each cap begins as a solid billet of 6061 aerospace-grade aluminum and is machined using advanced 5-axis CNC technology. The result is exceptional fitment accuracy, structural integrity, and a premium finish that far exceeds the factory plastic component. After machining, each cap is polished and finished in a deep gloss black anodized coating to maintain its appearance over time.

The MMX billet oil cap is supplied as a complete plug-and-play solution, pre-installed with an OE-spec internal valve, spring mechanism, and Viton O-ring. This eliminates the need to transfer components from the factory cap and ensures consistent sealing performance. The internally sprung locking mechanism provides a secure and precise fit, eliminating common issues such as oil cap loosening or minor oil seepage that can develop over time with OEM units.

Beyond functionality, the cap is designed with an optimized grip surface, making removal and installation easier during routine maintenance. It integrates seamlessly into the engine bay and pairs perfectly with other MMX billet engine dress-up components for a cohesive and premium look.

Product Details

  • Designed and engineered in the UK
  • Precision machined from 6061 aerospace-grade aluminum
  • Full OE oil cap replacement, not a cover
  • Internally sprung locking mechanism for secure fitment
  • Pre-installed OE-spec valve, spring, and Viton O-ring
  • Gloss black anodized finish for durability and corrosion resistance
  • Improved grip surface for easier handling during oil service
  • SKU: MMR03-1601
  • Fits OE part number: 11 12 8 654 637

Vehicle Applications

Notes

  • Also fits a wide range of BMW models and MINI models. Please contact us to confirm compatibility for your specific vehicle.
  • Fits S58 and B48E engine applications only
  • Please verify OE part number 11 12 8 654 637 on your factory cap prior to ordering
  • Includes a 1-year manufacturer warranty against defects in materials and workmanship
  • Designed and tested in the United Kingdom

Ask A Question