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103 Posts
Discussion Starter #1
Just throwing up some information for reference. If it helps some of you guys out, awesome...

2004 Junkyard Special 4.8L LR4
Comp Thumpr Cam (completely wrong cam for the application, just had it laying around)
LS9 Valve Springs (may or may not float LOL)
Stock head gaskets, stock studs, stock internals and hardware

Hot Side of the Turbo:
GTO Manifolds V-Banded to 2.25" flipped up
2.25" 409 Crossover to T4 flange
Turbonetics RG45 Wastegate
Old Precision ported Garrett 70mm
4" Down-pipe fender exit

Cold Side of the Turbo:
CX Racing Same Side Intercooler 3" in/out
3" Charge Pipes
90mm Throttle Body V-Banded down to 3"
4" Intake and K&N


545 Posts
thats right down my alley, will be a blast when done! you going to run a th400. Havent messed with the 4.8 but ive heard they are pretty strong, done a buch of the 5.7, 6.0 and a 8.1L

those headers / feed pipes are interesting, never seen one done like that, the up and over. it will should work grate, usually they are all hidden some place, we had to do it the Y under the truck and run it back to feed the turbo on the 8.1L it worked good but ad a little lag. not that it mattered once on kill :)
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