I just finished my install of the Mr. Freeze kit and the dyno numbers amaze me WITHOUT A TUNE! I gained 30 HP and 27 Ft. Lbs. of torque. And now I am running rich with a 10.8 to 1 A/F. Now, to advance the timing a bit, lean it out and find out what the real gains are!! The installation was simple after you find a place to mount the reservoir. My intake air temps dropped over 60 degrees.