So im starting to plan the best way to route the cold side piping coming off the compressor up to the throttle body on my 2500HD. Its a T67 turbo remote mounted and a 2.5 outlet. The STS kit goes on the outside of the frame rail and hugs the body mount bracket closest to the fender well and then lines the fender well along the frame up to the engine bay. Ive seen a number of people route it through the front tube style crossmember of their lift (Cognito etc...) and then go straight up to their TB ( I have efans and could do this) but...on my procomp lift there isnt enough space so Id be running a 3" pipe under both crossmembers that would hang down like an ugly ducking and have the possibility of getting clipped or bent. Im not able to route it like the STS because of a few reasons, 1st the frame rail is deeper on the 2500HD and I dont have enough clearance to go around the front passenger side body mount with out tire rub being an issue, 2nd because of the frame being "taller" If I were to high center over anything length wise the pipe would be damaged where it crosses under the frame on the passenger side.

phew....

my last option is going to a 2.75" pipe and running it along the frame next to the headers up to the engine bay and then upping the diameter to 3" once in the engine bay. MY question is how will that affect boost pressure difference between the 2.75" pipe and 3" pipe differences? and wont the charged pipe (cold) being right next to the headers (hot) heat the boost pipe up like no other? should I just wrap it in heatwrap and not give a ****?

any comments or suggestions from turbo guys would be appriciated. The under the crossmember idea is easy and appealing seeing how the most offroad this thing will see is a little sand at pismo...

I cant decide

Keep in mind I'll be running ~ 5-8lbs of boost...