Is this hurtin my cars performance??

[Silver95Stint]

I am currently running with O/R H pipes(2 1/2 inches) and American Thunder Cat back system. The tails are 3inches and the mufflers are 4 inches ( I think). My only other modes are K&n air filter and 3.73's. If this is hurting me what can I do to get my performace back? Any help would be greatly appreciated.

 

[95CobraStang]

I really don't see anything wrong there.....3.73s are money!!....did u lose torque on the loss of back pressure or something? I know my car feels like it gains more when the o/r h pipe is on.....i dunno

 

[Silver95Stint]

I don't know it just feels like I'm losing horsepower and I don't know why. I was told that the exhaust could be to wide open and it's not good for our cars because our engines work mostly off back pressure.

 

[Smeckel]

You really shouldnt have to go larger than 2.5" mid-pipe and catback unless you're well over 400hp. I seriously doubt you have 4" openings on your muffler, but you may be loosing alittle with the 3" tips. I say just open up the intake side of your engine and you'll get that power back.

 

[Joes95GT]

You would be loosing significant torque if you indeed were using a 4" muffler, but I truly doubt you are. Did you buy the catback system as a kit? If so, the mufflers should be 2 1/2"; the same as the pipe diameter.

Joe