Independent testing confirms this 3D-printed Z-pipe can deliver more power than an X-pipe. Whether it is actually worth the ...

There are twisted individuals out there who don't want to put a Chevy in a Chevy and others who think the factory engine location doesn't always cut it when striving for improved engine fitment and ...

Ok, we've done header tests in the past, comparing various styles and sizes on moderate to high-powered street-style mills. In the case of the big-block Mopar, the default favorite tube size has long ...

When it comes to classic hot-rodding tricks, one of the very first things enthusiasts do is modify the exhaust for better sound and performance. The tradition started long ago, in an effort to improve ...

"Hey, look! Headers for a small-block. These'll work!" --Overheard at a swapmeetHow did you pick your headers? Did you spend more time deciding on the color of your plug wires than you did on this ...

The idea that Harley-Davidson engines need exhaust backpressure to produce power is one of the most persistent beliefs in the motorcycle world. Riders who bolt on straight pipes often report a loss of ...