what is the difference between the STI performance muffler

and those other after-market cat-back systems like the Greddy Evo?

I wanna mod my rex but I don't wanna void the warranty..... yet. I called my dealer asking whether installing the Greddy exhaust will void the warranty and he said that if it causes something to not work properly then it will. What possible problems can i have with replacing the exhaust?

Thanks in advance.

The first exhaust picture is the SPT/STi exhaust offered by dealers. The price you pay for that is just the muffler section of the exhaust system.

The Greddy Evo Exhaust is probably a full catback system meaning it replaces the resonator with a new pipe and has a completely different muffler section.

The biggest difference would be noise, appearance, and flow. I dunno how the Greddy exhaust system is but I think that the STI muffler sounds good and gives the car a really throaty sound.

Normally with exhausts they will not cause any major problems. The warranty issue is a very fine line and every dealership takes certain mods differently. It all depends on whether or not your dealership is mod friendly.

Do you gain additional HP by changing just the muffler and not the pipe prior to it? Thanks again.

Well anything that has freer flow will help improve flow. You will gain some horsepower but not enough to be noticeable.

Changing your muffler will absolutely not void any part of your warranty. About the only claim they could deny is if you screwed up your exhaust ahngers or something. The real upside to the SPT stuff is the quality. It's close to the fastest, pretty expensive because of mark-up if you don't have a connection, but usually worth it across the board for STi/SPT stuff.

k, thanks peeps.

HI GUYS, I'M THINKING ABOUT EXHAUSTS AND THE DEALER EXHAUST IS STILL AN OPTION FOR ME. I'M ALSO LOOKING AT BORLA CATBACK, BLITZ, ETC. WILL I NOTICE HP GAINS WITH BORLA CATBACK VS. DEALER INSTALLED STI MUFFLER? WHICH EXHAUST SYSTEM WILL GIVE GOOD HP GAINS, A NICE THROATY (BUT NOT TOO LOUD AND OBNOXIOUS) SOUND, AND BE ABOUT $400-600?
ANY SUGGESTIONS FOR A NEWB ARE APPRECIATED...

I'm interested as to how much the dealers are charging for the STI muffler?

Originally posted by FlaBrit
I'm interested as to how much the dealers are charging for the STI muffler?

They're all different, but you can't get a lot cheaper than the internet-savvy dealers. Try these:

Exeter Subaru (http://www.subaruwrxparts.com)
Tacoma Subaru (http://www.subaruparts.com)
iSR Performance (http://www.isrperformance.com)

They also have several good aftermarket exhausts available.

Originally posted by acsWRX
HI GUYS, I'M THINKING ABOUT EXHAUSTS AND THE DEALER EXHAUST IS STILL AN OPTION FOR ME. I'M ALSO LOOKING AT BORLA CATBACK, BLITZ, ETC. WILL I NOTICE HP GAINS WITH BORLA CATBACK VS. DEALER INSTALLED STI MUFFLER? WHICH EXHAUST SYSTEM WILL GIVE GOOD HP GAINS, A NICE THROATY (BUT NOT TOO LOUD AND OBNOXIOUS) SOUND, AND BE ABOUT $400-600?
ANY SUGGESTIONS FOR A NEWB ARE APPRECIATED...

On your WRX, bigger is better as far as exhaust is concerned. A 3" catback is pretty much the same powerwise no matter who makes it. It's just a matter of looks and sound preference. Start with rating them by looks (you can find pics of any listed in these forums pretty easily) and then try to hear the ones you think look good.

Necro do you play Diablo?

Anyway, don't mess with the dealer if they are subtley warning you about the muffler, because in the end they can deny you for a multitude of reasons they can manufacture regarding that minor modification. It all depends on the particular attitiude and understanding the dealer's management has regarding modification to your car...the department of transportation's laws and regualations are never quite "as spoken" in the real world (or in court for that matter)...remember THIS !!!!

...play the game...live within the confines of the warranty and be PATIENT...save for when the car is YOURS!!!