Bought my first SUBARU. an 05 STi with 16k miles. recently purchased COBB AccessPORT, AEM CAI, Perrin LW Pulley, Inividia V3 DP, and Perrin Dual tube cat-back. However i see skepticism about the design and actual performance of the Perrin Dual Tube. Any opinions on this system would help before the 30days are up so i can trade it. thanks.

 

Id be more worried about teh CAI

 

Whys that? and whats the best short-ram out there?

 

the stock air box with a drop in

 

i've got the k&n typhoon, sounds good, i love it.
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Paxil Class Action

 

The AEM CAI has been known to make the car lean without a tune.

 

Read first-

"INSTALLING AN INTAKE PREMATURELY

I fully understand the reasoning behind this mod in some WRX owner’s eyes. In most other cars a good Intake is worth 5 to 10 hp, however not so in the WRX. It does change the turbo spool sound to add a quite nice scream at full boost, however can potentially damage your engine, not to mention little to no power gain. The stock intake (minus the resonator, See Exhaust for diagram) is capable of 325 hp. Intakes simply lean your car out (More Air Less Fuel) to gain power and can seriously hurt your engine and turbo if installed before engine management and injector upgrades."