thanks 1st gen that's where I'M at it is after the compressor inlet. interesting that the point at which it is introduced is probably the most choked down portion of the plumbing. off the compressor it's 3'' then to 2 1/2'' at the inter cooler entry (and exit) then to make a necessary corner it goes to 2'' after inter cooling - then back to 3'' to the throttle body. i would think the greatest pressure in the plumbing would be just before that 2'' corner.....and the lowest would be when it opens back up to 3'' to the throttle body. everything from the intercooler to the manifold is experiencing this high pressure due to nos....a very sudden jump from 6 to 30+ lbs.