EXHAUST SCIENCE: A Very Informative Read

[Brody]

Here is a link to some very well researched exhaust systems and the science behind them...Exhaustive research, actually:D

Read it and learn a bit about what makes hp and what doesn't as well as a lot of other information:

http://www.superchevy.com/technical/engines_drivetrain/exhaust/0505phr_exh/index.html

[Popsgarage]

Great article Pete. One that most people don't really think about to much. SuperChevy had another one similar to this one several years ago that was really good too.