I would like to see the difference between Magnaflow's 4" single exaust and Quantum 9 Dist. 4" single exhaust they sell for $219! I found their website,
http://www.quantum9dist.com/July%20Special%201.pdf and am curious. I aslo recently added an egr blockoff plate with the newset PPE tuner to eliminate codes. I also run a Volant Cold Air Intake and couldn't be more pleased. Hope this helps. John, -Mountain Man Helicopter Hauling