c'mon people :sadwave:

 

yes you need a tune or engine management.

why do you want the perrin? i have never heard their exhausts were any good.

I think the invidia and Cobb downpipes catted will work best

 

reason the perrin was a good choice i guess was because it had 2 cats on it, i thought since it had 2 i wouldnt really need a tune up. lol

 

You can use any downpipe made for an 05+ Legacy GT. Please note that they are transmission specific. I do know that the 5MT LGT downpipes fit the 08 WRX/STi manual tranny cars just fine. I do not know if the 5EAT LGT downpipes fit the 4EAT WRX's correctly, or if there is even a difference in the downpipes between the AT and MT 08 WRX's.

There are several choices: Cobb, Invidia, Megan Racing, Perrin and a couple others.

 

With regards to the tune, you should get it tuned, but you don't have to especially if you go with the Perrin 2 cat DP. However the OEM tune on the 08 is truly horrid so there are huge gains to be had with a good tune especially in terms of low/midrange torque and spool-up.

 

With the issues they're having with the '08s, I wouldn't suggest doing anything that could void your warranty. If you must, though, get a 3" DP (the SPT is a 3" CBE) with a tune.

 

What issues would this be? The stop sale? Which has been removed IIRC.

 

Downpipe

Any little tips or tricks I should know before installing my downpipe? I am going to go with a 3" catless dp, maybe HKS?

 

Any little tips or tricks I should know before installing my downpipe? I am going to go with a 3" catless dp, maybe HKS?

I have a 3" cat less Invidia Dp with matched cat back, Just got a CEL from boost creep running WOT from second to third on the freeway.

Be advised, boost creep still an issue on the '08 WRX. If you are going to go cat less, you might consider porting your waste gate as well

 

What issues would this be? The stop sale? Which has been removed IIRC.

Yes, that's what I'm referring to, but still - I'd be cautious (but then again, I'm usually overly so anyway).

 

safe boosting

with a 2002 wrx motor with a catless dp and turbo xs boost controller/fuel computer dtec, could i safely run more than 14 lbs of boost with the stock td04 turbo? some of my maps apparently have 16.5 lbs of boost in them. the turbo xs dtec isn't even hooked up and tuned yet. i read somewhere that it wouldn't be wise to run more than 14 lbs of boost with the stock td04 turbo.

 

the stop sale of the 08's were based on the NON-US models.

 

That was quite the read, but informative. I plan on going with the perrin performance or cobb catted down pipe and some other go fast goodies. I like the bellmouth design...that way when the warranty expies I can throw on a larger turbo and not have to replace the down pipe.

 

Perrin DP

I just ordered the front section for the Perrin DP, I plan on getting the rear section and an Agency Power Ti Cat Back exhaust. I was just wonderng for the couple of you that did go with Perrin, how you like the fit and finish, butt dyno results, ect. I will be ploshing the inside of the DP at the flange and beveling the edges for the exhaust and wastegate ports.

I don't need a ton of power yet, I just want to get to Stage II safely and legally. Planning on the STI TMIC, and one of the intercooler water spray systems from prior years (or make my own).

Also has anyone heard anything good or bad about Megan Racing suspension?