Just to clearify, im not talking about a cat-back exhaust im talking about the catalytic converter.

RIght now i have the RRM test pipe, and i noticed that since the ehxaust is soo open, my gas mileage is just plan horrible. Also, there is what im guessing un-used gas dripping from my muffler.

So i think im playing on just putting my stock cat back on. I have the kamikazi headers, with downpipe so im guessing i wont notice and loss in power?

Do you guys think i will be loosign any power? I am thinking i should only loose like 4hp at most?

Thanks for the help guys.

 

after effects.....you will lose a little top end, but gain more bottom end.

 

Yeah, I doubt you'll notice any missing ponies

 

sweet, now i just need to wait for it to get a tad bit warmer, and ill put it back on... so i guess that means ill have a test pipe for sale... anyone interested, hehe

 

i did the same thing, i had the test pipe, but sold it, and put a cat back in, im actually a lot happier

 

ya i think i will be too ocne i make the trade back

 

Steve! where are you - i know you will have something good to tell me about doing this...

like gas mileage going back up or what not?

 

bump to question ^

 

What size was your test pie, just out of curiosity.

 

hmm all this talk of putting the stock cat back on..ill just have to see for myself..

 

I put my cat back on cuz it sounded like butt. An interesting note about gas mileage though - mine has stayed constant even with the testpipe in, which gives me a completely unobstructed exhaust except for one resonator.

 

Ya the car does sound like butt i think with all the openness and what not.

The test pipe is the one from RRM, so whatever size that is, im too lazy to look it up right now, its either 2.25 or 2.5.

I might be selling it in about a month, so if anyone is interested, keep your eyes peeled haha