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 ...

A couple of decades ago, you could easily pick the boneyard for an inexpensive engine core that would polish up nicely with a little cleaning and some machine work. Chrysler made millions of big-block ...

We gave our BMW Z8 a full performance makeover with Supersprint headers and complete exhaust system, followed by a Stage 2 ECU tune and dyno session! Hear the raw sound, see the full install, and ...