News: valves

BMW N54 Cylinder Head Upgrade – Part 2

By PTF

Most recent update from the machine shop. Here are the stock N54 cylinder head numbers followed by numbers with only work in the bowl, and then additional work with larger exhaust valves. Numbers are VERY exciting. There is 35+% more flow on the intake side and 13.5% on the exhaust side. Shop is working with…Read more BMW N54 Cylinder Head Upgrade – Part 2

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