Bob, I have the Monza. I never could get it hung right and ended up taking it to a local muffer shop and they rehung it for $40. You have to like loud to like the Monza which I do and I'm very happy with it now. I set off car alarms in the parking garage at work around 3,000 RPM. Marty Clark Gilbert, AZ 1974 TR6 CF17352U http://www.triumphowners.com/798