I'm not sure what others would tell you, but I've redone my exhaust system 5 times now trying to get the perfect flow and performance, dynoed them each time with air flow tests and the best result is how I have it now which is edelbrock headers and at the end of the collector Y pipe I have 10 inchs of 2 1/2 pipe then a Flowmaster 40 Delta series with a turn down pipe (45 degrees) the Muffler is right before the tranny cross-member and the turn down pipe throws my exhaust down at the ground right after that cross-member. I tried cat back, i tried dual pipes, then with a cross over pipe and a performance cat, it was all too sluggish, loud but sluggish. And i've havent had a problem with mud gettin up in the exhaust how it is now, and the sound it puts off is somethin else sounds like a big block V8 with a large cam. This setup compliments torque as well as horsepower, not to mention the hypnotizing sound.
