Thread: Glasspack decrease power?

Normally, mufflers including glasspacks have and inlet, and an outlet, to indicate the direction of the flowing exhaust gasses. If the muffler were to be installed incorrectly, (reversed direction), it could indeed seriously hinder the exhaust gasses and cause a noticeable lack in engine performance.

Originally Posted by blueguy

As much as I agree on basically everything...if you look at the design or the basic flow characteristics of a glasspack...I doubt installing it backwards would hinder pretty much nothing.

depending on what type of baffels or scoops are inside to direct the exhasut into the packing, putting it on backwards looks like it would increase flow on some, i run mine backwards since the scoops were pretty large i didnt want to slow down the exhaust that much