Engine Modifications
Hi guys, 09 WRX owner. Was looking at the Perrin Stage 1, and Stage 2. Stage 2 - 68 ft lbs 46 whp, Stage 1 - 54 ft lbs 38 whp. But wow the difference in cost is like $1300, for a gain of 14 ft lbs and 7 whp, worth it? I personally do not like the sound of the Perrin exhaust so probably doesn't...