Long story short. Remember- First truck that Hahn built with a Turbo. For a long time after the truck was delivered, my father insisted it was a turtle. The other members of the company (not being truckers or having any experience with big trucks other than their firetrucks) thought the truck was the cat's meow and told my pop to "buzz off aint nothing wrong with that truck." Over the years they were convinced that yeah, maybe it is a bit slow. So they tried bigger injectors and other bullshit plays, but nothing ever worked. So sometime around 1995 or so, when it was pretty much forgotten, Dad took it down to Penn DD/A down on State Road in Philly. They looked at it and scratched their heads, and put it on the dyno. Sure enough she was losing about 45-55HP somewhere. They were looking at it when an old-timer walked by and looked- And said "yeah theres the problem....." The turbo exhaust port was facing towards the front of the truck- the 3" exhaust line came off, made a 180 up, around and back to the ass end of the truck, and then there were two 90's to get the exhaust down low. Old timer says "get the right manifold- I think I saw one laying out back in the scrap pile....that will turn the turbo around which will straighten out the exhaust....Then use two 45's to drop it down...Oh,and bump up to 4" pipe. Oh and one more thing, get rid of that Farr intake/air cleaner under the hood there- put an external intake and air cleaner on top of the dog house. All its doing now is sucking hot air and not enough of it." So Dad did what he said with the manifold, the turbo and the exhaust....And "obtained" a new Donaldson canister intake that accidentally fell off a shelf at Jevic's parts room....And holy shit....It was another truck altogether. Penn DD/A even ran it in the dyno for free to see what the performance was....And yes picked up 45-55hp. We have the printouts somewhere.