Has anyone installed a free flow muffler to their stock exhaust? Any noticable benifits or effects, sound, millege, power, can it trip codes or void warranty etc...

Thanks, "Fast Eddie"

Had one until about 5 hours ago.
It has it's advantages. Got it done for about $145 .00. I wanted to see if I could get the EGT's lower and swapped out for cat delete and 5" MBRP.