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I believe that most people who use torque cones are running open drag pipes, ie no baffles.
I'm not sure if they would help on a stock system.
Agreed. They are for open drag pipes, not baffled systems. They are reversion cones and won't do diddley in a stock system with mufflers. In fact, in a stock system they might even hinder performance.
Last edited by bikerlaw; Nov 20, 2012 at 09:16 PM.