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Over time, the factory valve cover hardware on M50, M50TU, M52, M52TU, M54, S50 (US), and S52 engines is subjected to continuous heat cycling, oil vapor, and moisture, causing original cap nuts to oxidize, corrode, or thread-strip during routine maintenance. Our Polished Valve Cover Cap Nut serves as a direct replacement designed to address these common failure points while improving upon overall engine bay aesthetics.
Because maintaining precise gasket compression is critical to preventing oil leaks, these cap nuts and washers are machined directly to OE-style dimensions. This exact fitment allows for direct compatibility with original and replacement valve cover studs (see T#55317643) and ensures the hardware can be torqued precisely to OEM specifications without guesswork. Manufactured to grade 8.8 structural strength standards, the hardware maintains the necessary clamp force required under normal and high-performance engine operating conditions.
To resist corrosion, both the cap nut and washer undergo an electroless nickel plating process during production. Unlike standard zinc coatings that dull or rust over time, electroless nickel provides a uniform layer of corrosion resistance that withstands long-term chemical exposure and extreme temperature swings while giving the hardware a polished, high-end appearance. Each cap nut assembly includes an OE rubber washer seal, ensuring a tight, leak-free barrier that prevents oil from escaping through the mounting studs.
This product was last offered at the strikethrough price on
09-29-2026
This product was last offered at the strikethrough price on
09-29-2026
The N54 valve cover, while not a terrible design, has it's share of flaws. Most owners have had to replace this part over time as it can crack for seemingly no reason. Additionally, the stock valve cover has its limitations for vacuum and PCV connectivity.
VTT is proud to offer a ground-up system designed to give the end user complete control over their valve cover/ PCV set up. Tired of being told you will run two -10 lines from your VC to your Catch Can? Now you can run them any way you want! Including complete VTA, oil cap one-way breather, or whatever else you may need. This i a true solution that solves many plumbing headaches.
Accessability options aside, this part looks magnificent. CNC Machined and anodized in your choice or Red, Black, or Clear, this valve cover is sure to turn heads!
Details:
This part fits the following BMW engines:
2006-2013 N54
