I didnt balance my xtd when i put it on. I havent had any problems. I am making to much power for it now though. I slip in boost at 20psi when im at the track now that i have wide tires. I need to get a new one but it served me well untill i started turning the boost up alot. For a stock or slightly modified turbo motor and pretty much any NA motor i say they work great. they do chatter from time to time though.