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![Evolve Billet Oil Filler Cap for BMW N54 I N55 I S55 I B58 Evolve Billet Oil Filler Cap for BMW N54 I N55 I S55 I B58](https://cdn11.bigcommerce.com/s-ublhigbe0h/images/stencil/original/products/18537/84444/evolve-performance-billet-oil-filler-cap-bmw-n54-i-n55-i-s55-i-b58-713522__70568.1714156979.jpg?c=1)
Manufactured from T6061 billet aluminium, our thermostat dress up kit for the BMW N55/N54 and S55 engines offers a high-quality aesthetic update to the OE thermostat cover. Installation is extremely easy and the end result speaks for itself, a must-have for those that like their engine bay looking at its best. Please Note: Comes with oil adapter 1/8 NPT If these parts are exposed to excessive heat for prolonged periods of time, it can affect the overall finish which is unavoidable with anodised aluminium products.