Originally Posted by scrapiron7
Neither an intake or cat back will change your gas mileage.
Sure it will cause you want to hear the exhaust and that will decrease your mileage .
After my Borla I was so happy I drove like I stole it the first week
07 SRT8 Silver Cam,PP heads&intake BT CC ,Borla S ,Eibach, Volant CAI Hid's all around Smooth and logoed moldings , Carbon Medic V2 ,Stillen's,Mopar Spoiler , TS led Rear fogs,Quad Projectors, 275/315 Dueller HP Sport ,Eibach's.Tuned By Diablo and CMR by OVERKILL, R1's StopTech's