In my own personal experience, and I've installed just about every brand name exhaust out there from Borla, Gibson, Magnaflow, Flowmaster, Volant to name a few, and I believe Borla is the top of the industry as far as build quality goes. Magnaflow, Volant, and Gibson were all very well built exhaust systems with Flowmaster bringing up the rear. Flowmaster quality has gone down in recent years IMO. The Flowmaster I had installed on my 04 Ram only lasted 2 years before rotting from the inside out. Just personal experiences...