Like stated above, mod at you own discretion... Just be prepared for consequences. You do risk voiding the factory warranty if they trace the failure back to a tune or mod (blower etc). BUT, I always say drive it like you want from mile one. Break it in how you drive and don't look back. I went with a procal tune and ripped of 12.60's in 3000ft da's in an auto GT with only a procal and axle back. So they respond very well to minimal tuning. (procal had a ford racing warranty supplementing the factory one).