just installed COBB stage 1 tune on the wife's WRX STi. car should be making around 342 hp and 340 lb-ft of torque now (thats 40 more than my RS!)... drove it round the block a few times. biggest difference is how much more torque the car has down low. all the power used to come in around 4.5k rpm, now you get feel the power as early as 3k rpm.
Current: 2013 F10 M5 & 2013 GLK350
997.1 GT3RS (gone)
2009 WRX STI (gone)
e92 M3 (gone)