Well I guess all I can say is I read on turbo forums with lots of people with all kind of blow through problems trying to do it them selves and trying to save a buck here or there. My experience best $650 I ever spent. Bolt on and fired right up. Had to make one jet change and at 14lbs perfect 11.5 afr. I couldnt ask for more. But CSU is considered one of the best in the business. Thats my