Muffler only losses?
I've been planning on doing the ls6 manifold and ported TB next power wise.
My exhaust isn't that bad sounding but sure isn't what I want soundwise. Right now this is my daily driver and i've been debating what to do exhaust wise and it seems every 15 mins my mind changes.
My question is, how bad will having just a muffler hold me back I'm told the Fbody muffler alone is pretty bad and my "upgrade" is going to do alot of the gains for a other wise stock powerwise car *save a MTI clear lid* would see.
Also just what you posted that you felt LTs before catback was a worthwhile move, is just what I was looking for.
Thanks for the help though.

