i know they sale a aftermarket exhaust manifold for the left side of the engine to get rid of the step down in the OEM manifod. but have not seen a down pipe yet.
__________________ 2001 GMC SLT 2500 HD Crew Cab short box 4X4 LB7
4" straight exhaust K&N air filter 285/75/r16 150,000 miles
Auto Meter Carbon Fiber Ultra Lite Pyro, Boost Gauges
PPE Boost valve.
Turbo MP Mod
Timespentsearching on here also makes one. His name is Freddy
Not quite, he sent one with the modded turbo he was having me test, i needed to do some working over to it to even get it close to fitting. I'm not sure if he'll be making them any time soon with how busy he is.
__________________ 2002 GMC LB7
Cognito tie rods and braces, SC stage IV 1056 converter, MITUSA lift pump, RDL up pipes
Homemade twin turbos, stock IHI over s475
Not quite, he sent one with the modded turbo he was having me test, i needed to do some working over to it to even get it close to fitting. I'm not sure if he'll be making them any time soon with how busy he is.
Ohh I was just going by one of the post he made where he was talking about making the intake horns, compressor wheels, and downpipe
__________________ Name: Trevor Truck: 02 LB7 Chevy 2500HD 4x4 Crew Cab Long Box LT Add-ons: Reflexxion Ram Air Style Cowl Induction Hood, 285/75/16 Wildcat EXT, Spray on Bed Liner, Firestone Rear Airbags Performance: Banks Ram Air Intake, 3.5" Straight Pipe, PPE Boost Increase Valve, Turbo Intake Horn Mod Wish list: Too long to list!!!
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Performance downpipe for lb7??? 
right they just show n' shine aint spoolin that turbine
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