[Official] "Do I need a tune with bolt-ons?" thread

[Jordo!]

Originally Posted by seymore4

If you've got the $$ tune it. It will run better guaranteed, you'll have better throttle response, more power, more efficiently running engine, and it will pull a lot smoother and harder.

The difference in how the car performs will be like day and night with a good tune, even if peak gains are minimal -- a lot of extra power can be picked up throughout the rev range, with better responsiveness.