No way! This motor isn't detuned in anyway. IT came from AMG at 349 hp. NOT 330 as listed. 19 hp was a lie because Daimler didn't want it competing with their MB brother. I didn't gain that in a tune with a cold air intake... It's his money if he wants to waste it. The tune is the last thing you do after you have installed all the aftermarket products. I never understand all the retuning that goes on. Plot your course, get it installed and then bring it all together with a tune. Had the new pulleys not come along, I would never have needed a new tune...