Idle is so smooth and it almost sounds quiet. Throttle response is rediculousely quick. In neutral snapping the throttle to 3500 real quick made the boost guage jump to 6 psi. Getting on it a touch just to see what's up with the responsiveness while headed to the gas station a few minutes from the house and had trouble keeping these 265/75/ r16 mudders from spinning on pavement treating the go pedal as I normally would. I did develop a pretty decent fuel leak though as I just found that my rear passenger return line cap appearantly isn't seated all the way. At 85 (which shoulda took much longer to reach) my coolant temp was a touch higher than normal at 200 flat till fan kicked in, egts wouldn't get above 780 f. Boost guage was dancing between each shift and at 85 was playing peek-a-boo with 14lbs on a 5%grade. Didn't get done in time to load up the trailer and do a nice pull, but fortunately for me I have a nice 04 Cummins dually on my trailer with a busted clutch. Trailer right now is not the 15 k I wanted it to weigh but I guess 12k is close enough to jot a few numbers down on a decent pull probably tomorrow afternoon. This thing is a good bit more awake than before and I would recommend these injectors to anyone just wanting to boost a bit of power out of their truck. These would be wonderful with a bigger pump, upgraded turbo, and intercooler I would assume as part of a power upgrade and even by themselves they have made my throttle snappyer than ever before, my turbo that is stock more responsive and made the truck run so much smoother than before it actually made it quieter to a small degree. Kinda hear the turbo over the block. Lol. And scared the wife a bit. Gotta love that.