Most Power / MPG for the $

[Goodinblack]

Does this go for the GMPP stuff too?

JD08 said he was still really happy with the loudness of the muffler years later.

Also, will a straight through design muffler kill my low end?

 

[tx tahoe z71]

Does this go for the GMPP stuff too?

JD08 said he was still really happy with the loudness of the muffler years later.

Also, will a straight through design muffler kill my low end?

Sadly, most people show very little dyno gains (less than 10rwhp) with a new muffler at stock power levels. It is mainly for sound. Can't say I noticed any difference when I put mine on years ago.

Both Borla and Magnaflow are straight through, Flowmaster is not (and is a waste of money IMHO).