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 ...

What are exhaust headers? How does an exhaust header increase horsepower? What's the difference between a 4-2-1 header vs 4-1 header? This video explains how exhaust headers are used as a portion of ...