what would be better for my gt500....ARH LongTube 1-3/4 304-SS Headers + X Pipe no cats for 2007 Mustang GT500 with the MBRP axle backs or slp loudmouths... OR the ARH long tubes with cats.


either ARH long tubes with cats
ARh long tubes no cats

and
either the SLP loudmouth or MBRP dual axle back system..



please help

 

also what does the cats on do to the sound of the car?>

 

Quiet it down. Reduces some of the raspiness in an x-pipe.

 

if you go w/ MBRP go w/ o/r x pipe. if u go w/ LM's go w/ catted x pipe.