Dont do it! The Sti tmic is good for 400bhp. Your not even going to notice if you only do short blast's. It's not just the price of the fmic dont forget the re-map price. The fact your cutting into your pride & joy & you do gain a little more of the dreaded lag. If i used my car every day i would not have changed from my tmic. The black Sti im useing at the moment is so much better for an everyday drive with the oe tmic. Just my opinion.