Saturday, December 24, 2022

What Ever Happened to Five-Valve Cylinder Heads?

The theory was that adding a third intake valve would get more air into your engine. In practice, it didn't work all that well.

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Black Friday Sales Have Begun; Get Great Deals on Automotive Gear Now

View in Browser   SHOP EXCLUSIVES SUBSCRIBE Welcome to The Shop, where Road & Track editors and the Hearst Autos Gear Team highl...