MMR Billet Aluminium Oil Thermostat Cover Lid & Caps Kit for BMW N54 N55 S55 | CNC T6061, Anodised, OE-Style Fitment, Optional 1/8 NPT Gauge Adaptor

MMR Alloy Thermostat Housing Lid and Cap Set for BMW N54, N55, S55

Lift your engine bay with a premium alloy thermostat top and matching caps that look factory fresh and feel motorsport grade. This MMR set replaces the standard plastic items on the oil cooler thermostat, delivering a crisp, high-quality finish that complements both detail-driven show builds and purposeful track cars.

Precision machined from 6061-T6 aluminium and finished in anodised alloy, the result is a tough, clean and long-lasting upgrade that slots straight in with a factory-style fit. We run this kit on our own cars and customer feedback has been excellent for its tidy appearance, robust construction and easy installation.

Why enthusiasts choose this upgrade

• Solid aluminium construction for durability, heat resistance and a premium look
• Direct swap for the original thermostat cover and caps with a factory-style seal
• Optional 1/8 inch NPT sender take-off for oil temperature or oil pressure gauges
• Clean, OE-like styling that elevates engine bay presentation in minutes
• Precision machined for a precise, rattle-free fit and tidy detailing
• Anodised surface for corrosion resistance and a high-end finish

Ideal for

• BMW N54, N55 and S55 owners seeking a billet alloy thermostat top upgrade
• Engine bay detailing and dress-up for a clean, OEM-plus appearance
• Adding a gauge or sensor using the optional 1/8 NPT port adaptor
• Track, fast road and show car builds needing a neat, durable solution

Compatibility

Suitable for BMW models equipped with the N54, N55 and S55 engines. If you are unsure, contact us and we will confirm fitment for your vehicle.

Sensor take-off option

Choose the version with the 1/8 inch NPT adaptor if you plan to run an oil pressure sender or oil temperature probe. This provides a clean, reliable port without extra fittings or messy T-pieces.

Professional fitting available

Want it installed by specialists who know these engines inside out? Book fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Important note

As with all anodised aluminium components, prolonged exposure to high heat may affect the finish over time. This is normal for anodised products.

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Order today for a tidy, motorsport-inspired finish and a straightforward, drop-in upgrade that looks right at home in any BMW N54, N55 or S55 bay.