MMX Performance BMW S55 / N55 / N54 Oil Thermostat Housing Cover Kit

The MMX Performance BMW S55 / N55 / N54 Oil Thermostat Housing Cover Kit replaces the factory plastic cover and caps on the oil thermostat housing with machined billet aluminum components.

The kit is supplied as a set rather than a single part. Alongside the machined cover plate it includes two billet caps and replacement O-rings, so the visible face of the thermostat housing is addressed in one installation.

Each component is machined from aircraft-grade 6061-T6 billet aluminum and finished in the proprietary MMX deep gloss black anodizing, which provides corrosion resistance in addition to the appearance. The finish matches the wider MMX billet engine bay range.

Installation is a direct swap at the existing housing. The thermostat and housing itself are not disturbed, and the factory components can be refitted at any time.

Two MMX parts fit the same assembly. The MMX oil temperature and pressure gauge adaptor replaces the OE plug with a 1/8 NPT port and is finished to match this kit, and the MMX low temperature oil thermostat installs into the same housing on N54 and N55 engines.

Product Details

• Billet replacement for the factory plastic oil thermostat housing cover and caps
• Supplied as a kit with the cover plate, two billet caps and replacement O-rings
• Machined from aircraft-grade 6061-T6 billet aluminum
• Proprietary MMX deep gloss black anodized finish
• Corrosion resistant
• Matches the wider MMX billet engine bay range
• Fits the OE oil thermostat housing used on N54, N55 and S55 engines
• Direct-fit installation with no modification required
• MMX part number: MMR03-0502-BL

Related Products

• MMX Performance BMW N54 / N55 / S55 Oil Temp & Pressure Gauge Adaptor
• MMX Performance BMW N54 / N55 Low Temperature Oil Thermostat
• MMX Performance BMW N20 / N5X / S55 Billet Oil Filter Housing Cap