June 21st, 2010
Do high performance mufflers make horsepower gains or are they marketing pipe dreams? They advertise that their mufflers increase performance quite dramatically from a stock muffler, but never seem to have dyno tests to provide proof. They often only quote muffler flow rates in comparison to a “stock” muffler. The question should then become how much flow is required and how much does more than good enough make? Finally, Horsepower TV on Spike TV (episode HP2010-07) did a dyno comparison test of some Cherry Bomb mufflers for sound levels and horsepower.