Performance Mufflers

[Flashmn]

works just fine. good thing is it works like a muffler, I got the car and one chambered muffler in the back, turbo kills some of the noise tho.

[majortom1981]

Since this got way off topic.

So the trd exhaust will not add anything to a 2004 corrolla?

[Kr0n1k]

The exhaust should give you a bit more oommph yes. Just the muffler, not anything noticeable most likely.

[Flashmn]

Doubt it would give you anything else than placebo-horses, I'd save the money for something else.

[majortom1981]

Another question. Is it worth putting in a Cold Air intake if I alread have one of the Reusable TRD AirFilters?

[dawg]

I don't know about a 2004 but on an xrs you get at least 5hp from the trd exhaust and maybe 8 from the cai. before I got my exhaust I could go fast but now with the exhaust I fly in lift - there's your f'n dyno for some of you!

A wild guess from me would be 1 or 2hp for a 1zzfe engine.. maybe 4 or 5 with both exhaust and cai.
But it could cause too much attraction more than anything.
For something a little discreet I would say just get a cai amd hope you get 3hp and increase your gas mileage.

[TheOtherCarolla]

Why not buy the muffler, go to a local muffler shop and have them bend some 2 1/4 pipe and weld the muffler to it. A Catback will make much more power than just a muffler alone. Pair that with a C.A.I., Better ignitoin upgrades and your cookin.