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Dirty Hooker Diesel 01-04 GM LB7 6.6L Duramax DHD Stainless Steel High Flow Long Up Pipe Set

Kit includes Gaskets and Hardware!
Extended Length Up Pipe Set
High Flow Manifolds Required

This extended length high flow up pipe set allows 53% greater flow than stock and is a designed to work with DHD or PPE high flow manifolds. Unlike factory parts, DHD's up pipe is manufactured from 11 gauge 304 stainless steel and includes DHD's HD 304 stainless steel, internally-sleeved bellow that can take the abuse of high temperature and high pressures. Each up pipe outweighs the competition by nearly a pound and features internal and external flange TIG welds!


  • Inner and Outer TIG welded Steel Flanges (Not cast like competitor)
  • Stainless steel 11-gauge .120-inch wall, 2-inch OD Up-Pipe
  • For use with High Flow exhaust manifolds ONLY
  • Significant reduction in exhaust back-pressure
  • Lower exhaust temperatures 
  • Free-flowing stainless steel inner liner bellows

Kit Includes:

  • Stainless Multi-layer Up Pipe Gaskets (2 Upper, 2 Lower)
  • (12) 12PT Coated M10 12.9 Up-Pipe Bolts


  • 2001-2004 LB7 GM 6.6L Duramax 2500HD/3500HD

DHD: 300-117

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