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Old 08-08-2009, 10:07 PM   #1
Twin_Cities_WRX
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Default DP and UP questions and recommendations

Hey guys I think I'm finally going to buy a downpipe and up pipe for my 2005 wrx. I have two links below, do you guys feel this is a good deal and will I need anything else or are these pretty much "install and play"? I understand it will need to be tuned, I will have that done at RS motors in MN. Any recommendations?


http://cgi.ebay.com/ebaymotors/INVID...Q5fAccessories



http://cgi.ebay.com/ebaymotors/Invid...=p4506.c0.m245


I have skunk 2 catback exhaust and K&N typhoon intake.
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Last edited by Twin_Cities_WRX; 08-08-2009 at 10:23 PM.
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Old 08-08-2009, 10:30 PM   #2
DC-WrX
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For the up pipe you need new gaskets. Don't reuse your stock gaskets. Also, look here in the classifieds section to see if someone is getting rid of an 06+ model year up pipe. They have no catalytic converters in them from the factory and bolt right in. A lot cheaper too. I'm not sure if that down pipe link you have includes new gaskets; but it probably does.

Edit to add:

It's recommended that you not re use your EGT probe. It's the same problem as the old catalytic converter. Pieces can break off the probe and shoot into your turbo causing it to crap the bed, and that's bad. You can either look for an up pipe that has no EGT bung, and simply use the "resistor mod", or you can get one with no bung and leave your EGT harness and probe connected; and just leave it in the engine bay near the headers/up pipe area so that you don't throw a code for the EGT probe missing.

You can also plug the EGT bung with a bolt to seal it, and do either of the above mentioned methods to eliminate the CEL that you'll get afterwards.
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Old 08-08-2009, 10:33 PM   #3
Jubert69
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Good deals to find is on nasioc classifieds, not only are you getting better quality parts, but used is cheaper and you aren't supportin ebay products. I have an uppipe for sale actually for $45 shipped.
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Old 08-08-2009, 10:33 PM   #4
Ryan314
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Don't go fully catless... get a DP with a high flow cat. Saves you a lot of hassle, and some back pressure to the turbo is a good thing.

ERZ makes a very nice high flow cat DP for $299.
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Old 08-08-2009, 10:41 PM   #5
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Quote:
Originally Posted by Jubert69 View Post
Good deals to find is on nasioc classifieds, not only are you getting better quality parts, but used is cheaper and you aren't supportin ebay products. I have an uppipe for sale actually for $45 shipped.
What brand, and I'm guessing catless?
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Old 08-08-2009, 10:45 PM   #6
RaceTM
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I've done some research on exhaust parts lately, here's my $0.02:

Good choice for an uppipe. I wouldn't recommend getting a stock '06+ uppipe for your car as someone mentioned - there was a post over at nasioc where a tuner with a dyno did some benchmarks before and after replacing the stock uppipe on an '06 wrx and found it made a significant difference (which is relative, I suppose). The stock uppipe on newer models does not have a cat, but it is apparantly still a bit restrictive.

Good choice on the downpipe brand too, but if I were you I would not go catless. Your car will smell like ****, you will be hurting the environment, and you may have issues with emissions tests in the future. Oh and you will need to reflash your ECU to get rid of the check engine light once it detects you lost your cat.
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Old 08-08-2009, 10:47 PM   #7
RaceTM
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Oh and yes you will need new gaskets (4 total, one on each side of both pipes)...they will run you about $60 total from any dealer.
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Old 08-08-2009, 11:00 PM   #8
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Quote:
Originally Posted by RaceTM View Post
Oh and yes you will need new gaskets (4 total, one on each side of both pipes)...they will run you about $60 total from any dealer.
Subaru Dealer? They have 3'' in stock? I'm going to do 3'' dp and the size of the turbo inlet for the up pipe? What is the inlet size exactly? Thanks guys
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Old 08-08-2009, 11:05 PM   #9
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Quote:
Originally Posted by Twin_Cities_WRX View Post
What brand, and I'm guessing catless?
Yeah catless, looks like a megan but not sure. Worked perfect.
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Old 08-08-2009, 11:07 PM   #10
Jubert69
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The whole going catless issue, the smell isn't going to kill you, nor is it really that bad (unless you're leaking). It's all based upon if you care about the environment or don't feel out swapping downpipes for emissions.
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Old 08-08-2009, 11:11 PM   #11
Twin_Cities_WRX
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Quote:
Originally Posted by Jubert69 View Post
The whole going catless issue, the smell isn't going to kill you, nor is it really that bad (unless you're leaking). It's all based upon if you care about the environment or don't feel out swapping downpipes for emissions.

We don't have emissions tests anymore though? I do care about the environment. Maybe I could do a couple other things to make up for the pollution? (only joking)
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Old 08-09-2009, 02:04 PM   #12
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if you go catless and decide to not to use your egt bung bs in the up pipe bolt the hole up, go to radio shack buy a pack of 2.2k ohm resistors. (2.00$) you can remove the egt probe and place one of those resistors in the wire clip and it doesnt throw a code.
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Old 08-09-2009, 02:12 PM   #13
DC-WrX
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Or you can save the $2 and just leave your EGT harness and probe wired up. I really don't understand why people even buy the resistor to be honest. I know it's just $2...but hey; That's almost one gallon of gas these days
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Old 08-09-2009, 04:12 PM   #14
Twin_Cities_WRX
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Quote:
Originally Posted by Jubert69 View Post
The whole going catless issue, the smell isn't going to kill you, nor is it really that bad (unless you're leaking). It's all based upon if you care about the environment or don't feel out swapping downpipes for emissions.
Well lets take a vote. Who says catless and who says with cats?
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Old 08-09-2009, 04:24 PM   #15
RaceTM
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Quote:
Originally Posted by Twin_Cities_WRX View Post
Subaru Dealer? They have 3'' in stock? I'm going to do 3'' dp and the size of the turbo inlet for the up pipe? What is the inlet size exactly? Thanks guys
Depending on which catback you buy - mine (Cobb) came with a downpipe to catback gasket, it was 3". most catbacks should come with one, I would think. The turbo to downpipe OEM gasket is fine

(http://www.jscspeed.com/part_picture...44022AA180.jpg). It's open and is the right size for a bellmouth downpipe.

The uppipe is not 3", so as far as I know the OEM ones should be fine for that too. If not then I am out $30
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Old 08-09-2009, 04:27 PM   #16
RaceTM
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If this means anything, scoobytuner confirms that OEM uppipe gaskets are fine:
http://www.scoobytuner.com/products/...&productID=179
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Old 08-09-2009, 04:58 PM   #17
SlverEJ20
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Quote:
Originally Posted by DC-WrX View Post
For the up pipe you need new gaskets. Don't reuse your stock gaskets. Also, look here in the classifieds section to see if someone is getting rid of an 06+ model year up pipe. They have no catalytic converters in them from the factory and bolt right in. A lot cheaper too. I'm not sure if that down pipe link you have includes new gaskets; but it probably does.

Edit to add:

It's recommended that you not re use your EGT probe. It's the same problem as the old catalytic converter. Pieces can break off the probe and shoot into your turbo causing it to crap the bed, and that's bad. You can either look for an up pipe that has no EGT bung, and simply use the "resistor mod", or you can get one with no bung and leave your EGT harness and probe connected; and just leave it in the engine bay near the headers/up pipe area so that you don't throw a code for the EGT probe missing.

You can also plug the EGT bung with a bolt to seal it, and do either of the above mentioned methods to eliminate the CEL that you'll get afterwards.
Not totally wrong but you are missing some gaps/ better suggestions. Yes it is better to not reinstall the factory EGT sensor, then too because of the reasons you noted. But instead of going thru the hassle of finding a up pipe with out a egt bung, just buy a appropriate bolt that threads in to the hole and tighten it down. For the egt probe, If you get flashed stage two(which you would be dumb not to since you are installing a up pipe and down pipe), more then likely the map you flashed onto the ecu will have the cells already deleted. But if this is not the case then un plug the sensor put in a resistor and throw the thing out. If you have a problem with spending 2 bucks for a resistor, then how the heck would you have money for the up pipe and down pipe. I don't know it just doesn't make sense having a useless sensor swinging around my engine bay.

If you want a cheap up pipe that has a good chance of not leaking, then a 04 + sti up pipe or a 06 + wrx up pipe would be a great budget up pipe, Or gutting your factory up pipe could work also.

As far as gaskets go. You can not go wrong with factory gaskets.
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Old 08-09-2009, 05:04 PM   #18
SlverEJ20
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Quote:
Originally Posted by Jubert69 View Post
Good deals to find is on nasioc classifieds, not only are you getting better quality parts, but used is cheaper and you aren't supportin ebay products. I have an uppipe for sale actually for $45 shipped.

Whoever told you Invidia up pipes and down pipes were inferior products?
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Old 08-09-2009, 06:12 PM   #19
Twin_Cities_WRX
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Whoever told you Invidia up pipes and down pipes were inferior products?
should i get those than?
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Old 08-11-2009, 03:59 PM   #20
SlverEJ20
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I dont see why not unless you want a catted Downpipe
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