I went with MagnaFlow Performance mufflers, 2.5" in and out with a customer 2.5" exhaust with H pipe and stainless works exhaust tips flared out to 3". I usually prefer a more growly type exhaust and have had good luck with these mufflers on my other cars. As far as I know they are the same mufflers, I bought them at Summit and they list performance and race and I have always just bought the "performance mufflers". They may just be a different model of muffler from MagnaFlow but they were listed the same and appear identical to the mufflers on the other cars. TBH, I can't say I would use these again on this car, and will probably change them out in the future. I have found that this car seems to have a bit more drone at cruising speeds than the my other cars do. I am not sure if it is exhaust design or compression, but my Mustang has 10.5:1 compression and my 69 Camaro has 10.5:1 and my Chevelle is 11:1 so it may be the fact that the Mustang tips head straight out and have some sort of a resonator in them. Also, the other cars have big block Chevy engines, the Chevelle is a 454 and has the factory oval shaped outlets and the Camaro is a 396 and has turn downs that are tucked tight to the rear valence. Maybe it is the Mustang's trumpet type exhaust tips, I am not sure why. It is definitely louder and has a bit of a drone in the cabin, especially at highway type speeds with a load on the engine. I like the idea of the electric dumps like mach71351c did but they weren't in my budget at the time of the exhaust install. Maybe I will have the mufflers swapped to a turbo muffler and add the dumps when I have the car done and some extra money burning a hole in my pocket, haha.
