Well I took it for its first ride last weekend. Set up on my stock '06 motor, stock carbs, ADA head and MSD enhancer. It ran great, excellent low end, didnt seem to have any power loss after it heated up. I was running it super dry, almost no water at all and even though my headpipe was warm and my waterbox was too hot to touch, the chamber was only slightly warm and I could definitly see where it wouldnt heat soak your engine compartment the way a metal chamber would. Overall I am very happy with the way it performed.