Bit of an oxymoron but had enough raunchiness of the straight through Flo Pro muffler. Different application- it's a street 383 cid truck but there's a lot of experience here. Before you say it the wrong pipe size, you're probably right but for now it's staying. Have about 24-40 inches length to play with. Not sure if a better quality Magnaflow (straight through) will be any different, probably looking at Donaldson chambered diesel type muffler or a 'bus' muffler. Advice welcome.