Join Date: Mar 2010
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First and foremost you won't have to worry about boost creep, or boost spikes. That is usually limited to the 06-up 2.5 liter cars.
Since you have an 02 you don't "need" a tune, but it's highly recommended. I would get the Cobb tuner. Check around for a used one if funds are limited. They lowered the price on them last year so most places sell them in the $5xx range and offer free overnight shipping.
The next piece you'll want is an up-pipe. 02-05 cars have a catalytic converter in the up-pipe. With the age of your car that's likely deteriorated and there is a chance, albeit very small, that some of the cat pieces can come apart at higher boost levels. I picked up an 05 STI up-pipe for $60 on eBay. Any STI or 06+ WRX up-pipe doesn't have the cat. That's why I didn't feel bad about taking it out. Subaru likely wised up and realized this was a bad place for the cat.
Get some good factory Subaru gaskets since the one's that usually come with the less expensive DP's are usually garbage.
Best bet is to just keep your stock DP for emissions. If they just do a readiness check on the ECU you can pass, but if they do a sniffer test and visual you'll definitely fail.
If they do a sniffer/visual, just keep the stock DP ans swap it for the test.
I just picked up a Godspeed catless DP and have been reading up on some things before I go and install it and have unknown problems.
CEL was one but not alot and there is a way to fix the CEL but the DIY way will send the sensor in standby mode and not ready but I guess accessport has a fix for it w the OTS program.
I have a axelback exhaust and after I install the DP I was thinking I might get boost creep?
And I guess there are 2 ways to fix this from what Ive read.
1. port the wastegate.
2. Take to a good tuner.
And if I do get creep its ok to drive but not drive hard?
I have a gauge so Ill be able to keep a eye on it.
And my next step after the install was going to get a tune.
I was thinking about getting a OTS map for now maybe accessport?
Any info would help me lots.! Im still new to the mod world.
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