I decided to go this route first, no pulley. After this mod will be doing split cooling. Im hoping i made a good decision reading alot of reviews some really old reviews granted, seems like people like the tune. I really want to get it dynoed before the tune and do a after. Guessing on a dynojet 380-390whp and hoping with tune might get 420whp. Drivability is the other reason why, I’ve heard the car really smooths out but will see. I wonder if they do anything within the tune to get the car to run a tad cooler like fans coming on sooner or something else, dont know. I only have high flow filters and muffler delete which as we speak equates to nothing as far as hp mods. I’ll keep you guys posted and hopefully the results are good.