CochinoFilipino said:
Is there any performance (not sound or fitment) benefits to the Dual exhaust set-up?
I'm talking about a large diameter single exhaust where the area of cross-section would be about equal to that of the Dual set-up. Seems like cross-overs or H-pipes, are making up for a weakness in the dual set-up.
For resonance (sound): Dual 2 1/5
For performance: Dual 2 1/5 with long tube and H and X for engine less than 600HP. H and X pipes are not making up for a weakness, they are just adjusting the back flow pressure on the engine and improving the vacuum draw on the exhaust port...therefore improving performance
For fitment: Dual 2 1/2. Unless you got with pro-dump or side exhaust you will be hard pressed to find someone that will do a good job at mendrel bending a 3"+ exhaust over the rearend. You will lose on the I.D. from the crimping. You will end up spending big dollars on getting a restricted pseudo 3"+ exhaust.
Last point: anything bigger than a 3" muffler will require you to go to a truck muffler and fitment is almost impossible (location and ground clearance). In addition the cost of production will skyrocket after they add the "ugly" surcharge
