The best Upgrade I've installed on my '02 9-3 SE. Actually the first along with the crank vent kit and tranny mount as repair items. I had to get this to start off and let my turbo exhale more easily. Shortly thereafter I installed a free flow muffler, and let me tell you:
The acceleration is awesome, especially when I open the throttle. Getting on the freeway is a cinch, and the turbo spools up much faster, but seems as if it doesn't strain as it used to at wide open throttle. And the sound, is sonorous. It's deep and throaty, and burbles at idle.
The best upgrade so far, and I haven't yet added an open air kit, or cpu tuning (Those are next). Thanks GueniuneSaab!
Rating: [5 of 5 Stars!]