During one of our never-ending technical discussions, Jim Grubbs at Jim Grubbs Motorsports (JGM) suggested that we take a look at the flow difference between 30- and 45-degree valve seats. While ...
We earn commissions from purchases you make using links in our articles. Learn more. Every single car has valve stem caps, but let’s be honest—they’re all really boring. In fact, most cars come with ...
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