I've had the XZT for a couple thousand miles now. Very easy install. Very inexpensive. Very smooth power delivery. Never towed yet so I can't comment on that. I can say that I've touched about 1350degrees while flooring it on a large inline, getting off the throttle because I was approaching triple digit speed. I max at 40lbs of boost, not alot of smoke, just some haze. Someone else dynoed 350+ rear wheel hp with just the XZT and I believe close to 700lb/ft of torque. And very good customer service from Quad and his people.
Tony