I am trying to get ready for my next stages of mods and I awear I'm going around in circles. the short list is exhaust, turbo and a Exhaust brake. I want a good towing turbo yet want ti to have the balls to get me in the 650+hp mark. I realy don't want to go to twins but thats where I may end up. Heres where it gets to be a pain in the rear. depending on what turbo I get it may change my plans to get a PacBrake direct mount. and then on top of all of that what exaust system will work with out to much trouble and at what hp level do you need 5" over 4" and I wount even go in to my indecision on what company I should go with for my transmission 
