Paraphrasing Dr. Seuss's magnificent Cat-in-the-Hat, "Calculatus Eliminatus is the best friend that you've got; the way to find the missing horsepower is to find out where it's not!" As we all know, ...

Last month we told you about the certification of the TFS iron heads for small-block Fords through J. Bittie American. We have the same great news this month except it's directed toward Chevy fans.

Peer under the hood of the fast cars at the strip or the local burger joint and you'll see the AFR logo etched into more than a few cylinder heads. Racers demand proven performance, so it's no ...