Reviewed By William M (Virginia, MN) Reviewed for a 2006 Pontiac GTO —10/21/2016 9:23 PM
The DiabloSport in tune real woke up my GTO, alot more torque and power, Best HP for the dollar.
Reviewed By Shane D (Chesapeake, VA) Reviewed for a 2000 Pontiac Montana —3/1/2014 4:16 AM
Delayed writing this review until I had a chance to run a few tanks of fuel through the truck and try the various tunes. 87 Octane tune is noticeable better than stock, better throttle response, slight increase in MPG. 91 Performance tune really woke the truck up and if you can keep your foot out of it, the MPG was better than stock. Mileage XS (gas saver) tune performance was comparable to stock but the MPG gain in my opinion was not enough to compensate for the loss in performance.