Intake/DP/Exhaust ?

BHodges3 · 07-21-2003, 03:08 PM

First off... I know jack about how all of this stuff works and what most of this stuff means.

This is what I have pieced together so far though....

My first investment in my STI will be a Blitz SUS Intake. After that I know I need to do something with the "plumbing" of my exhaust (DP, etc.). I have seen different posts about the STI and its cats, or lack thereof, and don't know what exactly I should be looking to buy next. I know there are two different types of exhaust (turbo-back, cat-back). I know there is such thing as up-pipes and down-pipes. I am not necessarily looking for brand names, but I need to know what I do and DON'T need. Any help would be greatly appreciated.

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dlowman · 07-21-2003, 03:54 PM

Up-pipe is catless so you really do not need to change that out. The downpipe has a cat in it and there is one more cat after that. You can replace the downpipe and get a catless one which will increase the speed of the spoolup and make max boost come on a little sooner. For the rest I suggest you do a search and type in what your curious about.

BHodges3 · 07-21-2003, 05:06 PM

Thanks for the clarifications!

MTMS4 · 07-21-2003, 05:07 PM

You might want to read this thread before dumping $250 on the Blitz SUS........

Not everyone agrees it is necessary or even a good idea in the first place..........two sides to every story; just make sure you do some research.

http://www.clubwrx.net/forums/showth...threadid=31800

bparlette · 07-21-2003, 05:46 PM

would the dp help keep the turbo spooled up longer? what would?
thanks

SloPok · 07-21-2003, 06:05 PM

Spooled up longer? A bigger turbo would solve that, however that is another big thread. Downpipe would make the turbo spool a wee bit quicker however. With dp, exh, and Blitz sus filter, i got 281.1 on the dyno on a hot day.

07-21-2003, 03:08 PM	#1
BHodges3 Scooby Newbie Member#: 38532 Join Date: Jun 2003 Chapter/Region: South East Vehicle: 2004 Subaru WRX STI WRB w/ Gold Rims	Intake/DP/Exhaust ? First off... I know jack about how all of this stuff works and what most of this stuff means. This is what I have pieced together so far though.... My first investment in my STI will be a Blitz SUS Intake. After that I know I need to do something with the "plumbing" of my exhaust (DP, etc.). I have seen different posts about the STI and its cats, or lack thereof, and don't know what exactly I should be looking to buy next. I know there are two different types of exhaust (turbo-back, cat-back). I know there is such thing as up-pipes and down-pipes. I am not necessarily looking for brand names, but I need to know what I do and DON'T need. Any help would be greatly appreciated. * Registered users of the site do not see these ads.

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07-21-2003, 03:54 PM	#2
dlowman Scooby Specialist Member#: 22998 Join Date: Aug 2002 Vehicle: 2004 WRX STi GT35R 572 whp 93/meth	Up-pipe is catless so you really do not need to change that out. The downpipe has a cat in it and there is one more cat after that. You can replace the downpipe and get a catless one which will increase the speed of the spoolup and make max boost come on a little sooner. For the rest I suggest you do a search and type in what your curious about.

07-21-2003, 05:06 PM	#3
BHodges3 Scooby Newbie Member#: 38532 Join Date: Jun 2003 Chapter/Region: South East Vehicle: 2004 Subaru WRX STI WRB w/ Gold Rims	Thanks for the clarifications!

07-21-2003, 05:07 PM	#4
MTMS4 Scooby Newbie Member#: 5227 Join Date: Mar 2001 Location: Rochester, New York, USA	You might want to read this thread before dumping $250 on the Blitz SUS........ Not everyone agrees it is necessary or even a good idea in the first place..........two sides to every story; just make sure you do some research. http://www.clubwrx.net/forums/showth...threadid=31800

07-21-2003, 05:46 PM	#5
bparlette Scooby Newbie Member#: 39027 Join Date: Jun 2003 Location: Laurel Vehicle: 04 sti silver	would the dp help keep the turbo spooled up longer? what would? thanks

07-21-2003, 06:05 PM	#6
SloPok Scooby Newbie Member#: 37344 Join Date: May 2003 Location: Jax Vehicle: 04 WRB STI 04'	Spooled up longer? A bigger turbo would solve that, however that is another big thread. Downpipe would make the turbo spool a wee bit quicker however. With dp, exh, and Blitz sus filter, i got 281.1 on the dyno on a hot day.