Chevrolet took one heck of a chance by replacing its much loved small-block with the modern LS1 engine. The LS1 had big shoes to fill—after all, the original mouse motor was the darling of the racing ...

"Yeah, cool, but those engines won't last." "Sure, it's quick. For what it is." "That's as fast as they'll ever go." "I'd rather push my big-block than drive one of those. " (OK, I made the last one ...

Loyal HRM readers will no doubt remember our "Ultimate Chevy LS Cylinder Head Test" in the Dec. '10 issue in which we tested 11 different LS1/LS6 cathedral-port-style heads. In this issue we're doing ...

Cylinder head porting is one of those garage mods that lives somewhere between speed-shop legend and flow-bench science. Also referred to as port and polish, the idea is simple: Open up the intake and ...

The question of the day seems to involve the difference between the original cathedral-port and modern rectangular-port LS heads. More specifically, which one is better? Were we to compare two sets of ...