ihave a 2003 RS and i want to do a catback exhaust and an intake and i wanted to know what choices i had and which combo would have the greatest HP gain

thanks for the help

 

Hi.

My personal favorite combo, for sound anyway, is a Cobb intake with a Scoobysport or Prodrive full exhaust system. But then again, that'll cost you probably $700, and that's a heck of a lot for just exhaust and CAI.

If you're on a budget, have a muffler shop build you a cat-back, and get away with the whole thing for ~$200 if it isn't stainless (more if it is). Insofar as CAIs go, www.pdm-racing.com has one for $50 that's my personal choice for a CAI, when I pony up the money. The PDM (and GanzFlow, a similar design) maintains the OEM airbox, whereas the Cobb eliminates it.

The Cobb has greater power gain, but for me it's better to have a little more protection against water suck, since my car's a daily driver in New England. The OEM airbox has drain holes. That's a good thing.

-S2-

 

wow thats a sweet intake dealy.. i wanted to keep mine as stock as possible... and thats like exactly what i was looking for!

definatly gonna pick one of those up soon!

have any other websites for the exhuast? maybe a few with sound bites? thanks for the help

 

Well, www.prodrive-usa.com *might* be able to hook you up with a sound clip, if you contact someone there. Not sure.

A Scoobysport clip you can hear right on their website, check out www.rallyperformance.com which is their USA vendor in Pennsylvania. I think it plays automatically on the exhaust page.
I forget. If not, contact Ken Cole at kccole@adelphia.net ... he's the Email contact for them and can probably Email you the clip.

I have it saved on my PC but I have 56k, it'd take like a year to upload to you.

-S2-

 

sweet ill have to check those out when im not feeling so lazy lol

i almost ordered the intake just now haha im like Mr. impulse buy so im afraid to look at exhuast haha

thanks for the sites though!

 

Check out the full MRT exhaust too. It's headers and catback together for about $800 from Langston Subaru. As far as intakes go, Cobb is the very best as far as power, but a used Ganzflow will get you 5 or 6 of the 8 horses the Cobb gets for about 1/3 of the cost. Having the stock plenum box does help, and you'll want to get a K&N or equivalent too. (Unless you get the Cobb, which has an in-line filter.) Anyways, there are clips of the MRT exhaust floating around here and on some other sites like nasioc and ravensblade-impreza if you want to hear it.