Well quick question... Will stock exhaust hurt performance? I have slp catback and its just getting on my nerves now. It sounds great but its loud. So I was wanting to put the stock catback back on. But will it hurt performance in anyway? I dont think it should but idk. I have 2.8 ect......stock header/dp btw. I did try to search but I just keep getting a white screen after I hit search so...

 

I wouldn't say it would HURT performance, but I think you may loose some going back to stock. But you would only loose what you gained when you upgraded from stock.
I would say that Stock would be your baseline for performance.

 

If you are still on the stock header / DP... putting the stock catback back on won't make a difference.

 

yeah im still on the stock header/dp so no difference?

yeah probably 2hp lol I was just wondering if I was wrong. Oh and u put down 230 on that 2.85? Wat was your tq?. I dyno mine long time ago on a base tune and made 223whp and I thought it was low for a base tune

 

i had to put my stocker back on for a fix it ticket for "loud muffler" hahaha
so i took my stock exhaust that was in two pieces to the muffler shop, the guy just flanged welded my stock muffler instead of flange welding where it was cut

so if u want your 2.5 -3 inch cat back with the stock muffler it will be quiet and u can hear that baby whine

the guy just took off my vibrant muffler and sit it side by side with the stock one, made the cut and welded a flange

 

its loud on wot. But I never got a fix ticket.... Since on my side of tonw theres a bunch of trucks 5x louder than me and the cops are just used to it.....did get one once while driving my bros cammed t/a with the cut out open

 

The header / DP is the biggest restriction in the stock system. Adding a catback to that generally gains very little, therefore going back to stock will cause you to lose very little.

 

yeah thats wat I figured....little to no diff.

 

i gotcha, i ws just saying if you wanted to keep the cat back, just swap the muffler as it makes my car loud haha