Don't believe the hype: Viper headers come off pretty easily--just remember to number the spark plug wires before you pull them off. The starter and the heater box need to come off, too. Once we had the stock system off, we laid it out and made a comparison to the Borla T-304 stainless-steel system, to make sure we had all of the bends and pieces correct from left to right. This sounds silly, but you'll have a lot of parts floating around. Because we were using new headers and not the stock exhaust manifolds, we had to cut the cats at the inlet and weld them back into the "new" stock location (this is important for street-legal status). That was a no brainer, and the exhaust kit simply bolted on without a worry.