Ok long story short
I have CAI installed on the car and with stock exhaust was running 5.8 0-60 best time and 14.4 1/4 mi
now after installed straight thruegh free flowing muffler I am geting 6.0 0-60best and 14.7 in 1/4 mi.
Exhaust sounds butifull but I am wondering if I have lost too much back preasure and am loosing low end torque because of this.
Also my inlet on the muffler is 2.5 inch vs stock 3.0 inch so its s bit more narrow but muffler you can see thrugh, just like a resonator pipe.

What is going on here? Suggestions please.....

 

Need a tune IMO

 

just curious, what kind of muffler did you put on?

 

Bump

 

Also, let us know if it is a dual exhaust or not. If its a single pipe exhaust make sure that your muffler is big enough if not it is really easy for it to have to much back pressure and you will loose bottom end and top end.

 

ok muffler i got is a no name brand from ebay.. I know what you all will say. But the design and finish is great, stainless steel, two tips, sounds exelent, got that deep growl. Not a dual exhaust design, just a single like on a stock 03 sadan.
I defenetly dont think this muffler is more restrictive, you can see thruegh it. So the probelm i think is no back preasure which equals less low end torque.

 

cant be a dual exhaust (if i'm reading this correctly). sounds like he just changed the muffler, nothing else.

 

link us to what you got

btw, what were your intentions for getting this? if you wanted gains...id recommend just saving up for a catback or at least a ypipe back...

 

was it this one?

http://cgi.ebay.com/ebaymotors/OBX-0...66578480QQrdZ1

 

well i will say that this muffler sound real nice. Has that deep growl and not too much louder than stock at wot.

 

I wish

it was this one http://cgi.ebay.com/ebaymotors/CHEVY...63985379QQrdZ1

 

oh gawd

i have that exact one installed on my corolla no joke

what did you expect for 30 bucks??? this is NOT a performance muffler. i'm sorry bro...but PLEASE take that off your car and get the one i linked you to or the greeddy sp2 (assuming you only want to replace the muffler)

post pictures!!!!!! i'm curious as to how it looks! (not that ill get it...im happy with hks )

 

the muffler sounds and looks great, and like i said its a see thruegh design I dont see how it could have more back preasure then stock will post pictures soon..

 

isnt the muffler smaller than the stock muffler though...?

the results you posted in the first post...are those from the same day? if not, then weather conditions could have been different which will affect your results

 

yes it is smaller. but its see thruegh basicly like a resonator. So can it really provide more back preasure?