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.

No comments:

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...