Downpipe FAQ: Read if you are thinking of buying one! - Page 11

bbron12 · 09-21-2012, 11:09 AM

yea, a full tbe is what you want

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P-Train · 09-21-2012, 11:11 AM

Quote:

Originally Posted by scoobyd00d

Yea I have a new catback so I'm going to install it today. Is it just me, or is the flange between the cbe and dp a pita to disconnect? I've been fighting it for a while now. Used penetrating oil too.

Just break the bolts and replace them... not worth fighting with them.

scoobyd00d · 09-21-2012, 11:13 AM

Quote:

Originally Posted by P-Train

Just break the bolts and replace them... not worth fighting with them.

Yea as soon as I posted that I tried again and snapped one clean in half. But I'm not sure when I'll be able to get my catback so I don't wanna snap the other one and then it be wayyyy too loud to drive every day.

bbron12 · 09-21-2012, 11:15 AM

just get new bolts. any hardware store has them, like $1.00 and youll be all set

Subbie n00b · 10-04-2012, 01:55 PM

Hey guys, I'm new to all the car stuff but I am willing to take a go on it. I got a JNA catback exhaust, cobb AP v2, and now trying to find a nice DP with good performance but also financially acceptable.

Now my question might be really stupid but again I am a noob.

What is the diff between a catless DP and one with? Am I supposed to get a catless? And I'm afraid of this CEL error now.

If I installed lets say a invidia catted DP, Cobb AP, and JnA catback exhaust. Will I have a CeL error?

Thanks for hearing me out :/

-noobie

the suicidal eggroll · 10-04-2012, 03:23 PM

You're "supposed" to get whatever you want. Catted will be slightly more restrictive and make a little less power, but it's also about 90% less illegal and has less risk of boost creep.

The stage 2 tune you load using the AP when you install the DP will eliminate the CEL regardless of whether you go catted or catless.

Subbie n00b · 10-04-2012, 05:14 PM

Quote:

Originally Posted by the suicidal eggroll

You're "supposed" to get whatever you want. Catted will be slightly more restrictive and make a little less power, but it's also about 90% less illegal and has less risk of boost creep.

The stage 2 tune you load using the AP when you install the DP will eliminate the CEL regardless of whether you go catted or catless.

Thanks!

dritgert · 11-07-2012, 04:08 PM

Great write up

ANR62NV · 12-06-2012, 07:43 PM

If I have a custom tune on my catless downpipe , and I want to go catted (aftermarket) , would I need a re-tune?

SubeizRippin · 12-06-2012, 07:54 PM

Quote:

Originally Posted by ANR62NV

If I have a custom tune on my catless downpipe , and I want to go catted (aftermarket) , would I need a re-tune?

I believe so because flow changes

HinshawWRX · 12-06-2012, 08:30 PM

Quote:

Originally Posted by ANR62NV

If I have a custom tune on my catless downpipe , and I want to go catted (aftermarket) , would I need a re-tune?

No

Quote:

Originally Posted by SubeizRippin

I believe so because flow changes

Not enough to truly benefit from a retune from a tuner. And OTS maps cover catted and catless.

DelSol_Racer · 12-06-2012, 10:25 PM

great write up, just wanted to throw this out there, my buddy gave me a free bell mouth DP and a cat back exhaust (generic)
any one running one of these generic DP?

RHD 93 STi · 12-06-2012, 10:35 PM

i used to have the ebay knock off tbe. build quality is ok but was very loud.

HinshawWRX · 12-07-2012, 06:49 AM

Quote:

Originally Posted by DelSol_Racer

great write up, just wanted to throw this out there, my buddy gave me a free bell mouth DP and a cat back exhaust (generic)
any one running one of these generic DP?

There are about 5,000 "generic" DP's floating around. Depending on which one you have, it could be great. Overall it's just a pipe with welds, so as long as your welds are good, and no holes where a hole shouldn't be, you'll be just fine.

blaze wrx · 12-14-2012, 04:23 PM

Quote:

Originally Posted by Anubis450

Always get a tune after a downpipe, or you'll get terrible boost spikes :/

I get mixed feedback on this. The FAQ and other posts say no EM needed, my shop and other posts say to always get EM with a DP (cat or no cat) even on a 2.0.

I have catless UP, invidia CBE, no tune. Just trying to avoid buying an AP as I'm not seeking massive hp

Mr Wrex · 12-14-2012, 04:53 PM

Quote:

Originally Posted by blaze wrx

I get mixed feedback on this. The FAQ and other posts say no EM needed, my shop and other posts say to always get EM with a DP (cat or no cat) even on a 2.0.

I have catless UP, invidia CBE, no tune. Just trying to avoid buying an AP as I'm not seeking massive hp

You have a '02. It's not needed, but it is recommended. I would definitely just do the tune.

the suicidal eggroll · 12-14-2012, 05:12 PM

Quote:

Originally Posted by blaze wrx

I get mixed feedback on this. The FAQ and other posts say no EM needed, my shop and other posts say to always get EM with a DP (cat or no cat) even on a 2.0.

I have catless UP, invidia CBE, no tune. Just trying to avoid buying an AP as I'm not seeking massive hp

You don't need a tune, but without one you will gain almost nothing by your mods. So while a tune isn't needed for a DP on an 02, the DP is just a waste of money without one.

T_woot · 01-07-2013, 09:17 PM

Hey guys, was looking for some help on this one... Installed my Invidia Catted DP today. Upon bolting it up to the tailpipe and torquing down, there was a gap left between the tailpipe and the downpipe. I added some thicker gaskets but I am still getting an exhaust leak. Any suggestions on an affordable fix? Any repercussions driving the car with the exhaust leak? Thanks!

Here is a link to a picture

http://www.flickr.com/photos/t_woot/...in/photostream

SeeJ2005 · 02-18-2013, 10:08 PM

opened my eyes to a lot of very useful information. Thanks!

gambera · 02-18-2013, 10:50 PM

Quote:

Originally Posted by T_woot

Hey guys, was looking for some help on this one... Installed my Invidia Catted DP today. Upon bolting it up to the tailpipe and torquing down, there was a gap left between the tailpipe and the downpipe. I added some thicker gaskets but I am still getting an exhaust leak. Any suggestions on an affordable fix? Any repercussions driving the car with the exhaust leak? Thanks!

Here is a link to a picture

http://www.flickr.com/photos/t_woot/...in/photostream

Judging by the picture , you got stock exhaust

see if this thread helps, post #7 and 18

http://forums.nasioc.com/forums/show....php?t=2232026

Tylahh · 02-19-2013, 12:07 AM

Thanks for this info.
Appreciate the good write up

Daddy_Digital · 03-13-2013, 07:59 PM

Sorry for the ignorant question, but I must ask the following. Would the down pipe from a 08 WRX fit on my 02 WRX? I read somewhere that they are interchangeable. But I want this to be confirmed here. Thanks.

the suicidal eggroll · 03-13-2013, 08:08 PM

Pretty sure they're different lengths.

roarksbane · 03-14-2013, 06:54 PM

I finally have an exhaust leak after the turbo, so I'm going stage 2!

My problem: I'm environmentally conscious but am addicted to upgrades.

My question: which downpipe has the largest, cleanest, greenest cat?

My babble: I don't plan on going over 300 hp, so feel I can get away with a more restrictive cat. I would even be interested in a dual high flow setup if that's available, but any search I do comes up with very old results. Any info is appreciated, I've searched quite a bit and it's difficult to find the cat's ratings. I've read the smog thread on NASIOC, and the Maddad V2 gets the lowest smog numbers compared to other aftermarket setups that were posted, and I've already decided on his Whisper catback, and was about to get the V2 (300 cell cat btw), but those darn wastegate gasses won't be catted! How much exhaust is bypassed under boost anyway? If it's nominal, then maybe I will just go for the V2. Please, someone tell me it's nominal. I figured I'd ask these questions here before I started calling the manufacturer of every downpipe out there.

Unabomber · 03-14-2013, 09:20 PM

ZERO people know your answer. ZERO.

12-06-2012, 10:35 PM	#263
RHD 93 STi Scooby Newbie Member#: 241290 Join Date: Mar 2010 Chapter/Region: Tri-State Location: tristate ny Vehicle: 2002 wrx wrbp	generic pipe i used to have the ebay knock off tbe. build quality is ok but was very loud.

01-07-2013, 09:17 PM	#268
T_woot Scooby Newbie Member#: 321665 Join Date: May 2012 Location: CA Vehicle: 2006 WRX Wagon WRX Blue	Downpipe to Tailpipe Fitment issue Hey guys, was looking for some help on this one... Installed my Invidia Catted DP today. Upon bolting it up to the tailpipe and torquing down, there was a gap left between the tailpipe and the downpipe. I added some thicker gaskets but I am still getting an exhaust leak. Any suggestions on an affordable fix? Any repercussions driving the car with the exhaust leak? Thanks! Here is a link to a picture http://www.flickr.com/photos/t_woot/...in/photostream

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09-21-2012, 11:09 AM	#251
bbron12 Scooby Newbie Member#: 312440 Join Date: Mar 2012	yea, a full tbe is what you want * Registered users of the site do not see these ads.

09-21-2012, 11:15 AM	#254
bbron12 Scooby Newbie Member#: 312440 Join Date: Mar 2012	just get new bolts. any hardware store has them, like $1.00 and youll be all set

10-04-2012, 01:55 PM	#255
Subbie n00b Scooby Newbie Member#: 324558 Join Date: Jun 2012 Chapter/Region: NESIC Location: CT Vehicle: 2004 Impreza WRX WRB	Hey guys, I'm new to all the car stuff but I am willing to take a go on it. I got a JNA catback exhaust, cobb AP v2, and now trying to find a nice DP with good performance but also financially acceptable. Now my question might be really stupid but again I am a noob. What is the diff between a catless DP and one with? Am I supposed to get a catless? And I'm afraid of this CEL error now. If I installed lets say a invidia catted DP, Cobb AP, and JnA catback exhaust. Will I have a CeL error? Thanks for hearing me out :/ -noobie

10-04-2012, 03:23 PM	#256
the suicidal eggroll NASIOC Supporter Member#: 51961 Join Date: Jan 2004 Chapter/Region: RMIC Location: Broomfield, CO Vehicle: 2005 STi 2012 WRX	You're "supposed" to get whatever you want. Catted will be slightly more restrictive and make a little less power, but it's also about 90% less illegal and has less risk of boost creep. The stage 2 tune you load using the AP when you install the DP will eliminate the CEL regardless of whether you go catted or catless.

11-07-2012, 04:08 PM	#258
dritgert Scooby Newbie Member#: 320203 Join Date: May 2012 Vehicle: 2012 Impreza wrx STI Pearl White	Great write up

12-06-2012, 07:43 PM	#259
ANR62NV Scooby Specialist Member#: 283589 Join Date: May 2011 Chapter/Region: SCIC Vehicle: 2011 Impreza WRX Red	If I have a custom tune on my catless downpipe , and I want to go catted (aftermarket) , would I need a re-tune?

12-06-2012, 10:25 PM	#262
DelSol_Racer Scooby Newbie Member#: 339729 Join Date: Dec 2012 Chapter/Region: TXIC Location: San Antonio Vehicle: 2002 Impreza WRX WR Blue Mica	great write up, just wanted to throw this out there, my buddy gave me a free bell mouth DP and a cat back exhaust (generic) any one running one of these generic DP?

02-18-2013, 10:08 PM	#269
SeeJ2005 Scooby Newbie Member#: 340991 Join Date: Dec 2012 Location: Carroll County, Maryland Vehicle: 2004 Impreza WRX Silver	opened my eyes to a lot of very useful information. Thanks!

02-19-2013, 12:07 AM	#271
Tylahh Scooby Newbie Member#: 347517 Join Date: Feb 2013 Location: SLO, CA Vehicle: 2012 WRX Pearl White	Thanks for this info. Appreciate the good write up

03-13-2013, 07:59 PM	#272
Daddy_Digital Scooby Specialist Member#: 274205 Join Date: Feb 2011 Chapter/Region: SWIC Location: Mesa, AZ Vehicle: 2002 WRX Sport Wagon World Rally Blue	Sorry for the ignorant question, but I must ask the following. Would the down pipe from a 08 WRX fit on my 02 WRX? I read somewhere that they are interchangeable. But I want this to be confirmed here. Thanks.

03-13-2013, 08:08 PM	#273
the suicidal eggroll NASIOC Supporter Member#: 51961 Join Date: Jan 2004 Chapter/Region: RMIC Location: Broomfield, CO Vehicle: 2005 STi 2012 WRX	Pretty sure they're different lengths.

03-14-2013, 06:54 PM	#274
roarksbane Scooby Newbie Member#: 177658 Join Date: Apr 2008 Location: Connecticut Vehicle: 2004 WRX Wagon	I finally have an exhaust leak after the turbo, so I'm going stage 2! My problem: I'm environmentally conscious but am addicted to upgrades. My question: which downpipe has the largest, cleanest, greenest cat? My babble: I don't plan on going over 300 hp, so feel I can get away with a more restrictive cat. I would even be interested in a dual high flow setup if that's available, but any search I do comes up with very old results. Any info is appreciated, I've searched quite a bit and it's difficult to find the cat's ratings. I've read the smog thread on NASIOC, and the Maddad V2 gets the lowest smog numbers compared to other aftermarket setups that were posted, and I've already decided on his Whisper catback, and was about to get the V2 (300 cell cat btw), but those darn wastegate gasses won't be catted! How much exhaust is bypassed under boost anyway? If it's nominal, then maybe I will just go for the V2. Please, someone tell me it's nominal. I figured I'd ask these questions here before I started calling the manufacturer of every downpipe out there.

03-14-2013, 09:20 PM	#275
Unabomber Big Ron Moderator Member#: 18062 Join Date: Apr 2002 Chapter/Region: MAIC Location: I can save you a ton of cash Vehicle: on car parts so PM me b4 j00 buy	ZERO people know your answer. ZERO.