Hmmm, well the exhaust system was $395 from ATR. The Borla Muffler was fairly expensive around $250.00. I got the muffler for free off a wrecked race car. The whole system was modified to fit a NEW STYLE "S" Truck.
I must say that this is a VERY QUIET combination. With my truck being an extended cab the whole system is LONGER by about 20+ inches.
The truck made over 400 wheel hp and 500 ft lbs of torque like this so...I guess it flows OK?