When it comes to long-tube Honda headers-or headers in general for that matter-there are basically two primary designs: the tri-Y and the 4-into-1. As the name implies, the tri-Y refers to a group of ...

It's an accepted part of hot rodding lore that headers help make more power and torque on any engine versus the typical stock cast manifold, but do you know why? It's all about flow, right? Well, yes ...

Frankly, you'd think this subject would have been exhausted by now. After all, how much "borderless education" can you absorb about such common and oft-explained engine functions as getting rid of ...