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.

From Grime to Shine—Our Tested Picks for Spring Cleaning Your Ride

View in Browser   SHOP EXCLUSIVES SUBSCRIBE Welcome to The Shop, where Road & Track editors highlight gear, gadg...