
The Story
Description
Fits
| Â Year | Make |
Engine |
| 2001-2004 | GM |
LB7 6.6L Duramax |
Replace the lightweight, leak-prone, 1 5/8" OEM up pipes with these HDÂ 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not crack and leak like OEM. Increase Turbo spool-up and decrease EGT's.Â
Part Number:Â WCF100589
Features
- Passenger Side Up Pipe
- Driver Side Up Pipe
- Up Pipe Gaskets (4)
Notes
- This kit is for use with twin turbo applications and factory exhaust manifolds or WCFab Duramax Billet Exhaust Manifolds
- WILL NOT clear a conventional downpipe routed behind the engine. Both sides are built nearly symmetrical with no indents for a conventional downpipe to clear.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
Description
Fits
| Â Year | Make |
Engine |
| 2001-2004 | GM |
LB7 6.6L Duramax |
Replace the lightweight, leak-prone, 1 5/8" OEM up pipes with these HDÂ 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not crack and leak like OEM. Increase Turbo spool-up and decrease EGT's.Â
Part Number:Â WCF100589
Features
- Passenger Side Up Pipe
- Driver Side Up Pipe
- Up Pipe Gaskets (4)
Notes
- This kit is for use with twin turbo applications and factory exhaust manifolds or WCFab Duramax Billet Exhaust Manifolds
- WILL NOT clear a conventional downpipe routed behind the engine. Both sides are built nearly symmetrical with no indents for a conventional downpipe to clear.















