I haven't seen many numbers or many people sharing experiences with tunes and downpipe upgrades. I will be finishing my downpipe and ecu stage 2 tune on Monday. I did my numbers with the draggy for before and I will be posting my numbers for after the tune. If anyone has questions on the install or anything let me know !
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.