Uppipe Exhaust Flexible Pipe for 2001-2016 6.6L Duramax LB7 LLY LBZ LMM LML

GM Duramax 6.6L Uppipe (2001-2016) – Fact Check

✅ Actual Fitment:

• LB7 (2001-2004)

• LLY (2004.5-2005)

• LBZ (2006-2007)

• LMM (2007.5-2010)

• LML (2011-2016) (Note: LML uses different up-pipe design)

🔧 Performance Upgrades:

1. For LB7-LLY-LBZ-LMM:

   • Bellowed turbo crossover pipes (replaces failure-prone flex joints)

   • Upgraded turbo mounting pedestal

   • High-flow downpipe (actual restriction point)

2. For LML:

   • Upgraded turbo outlet pipe

   • High-flow downpipe (with DEF system considerations)

⚠️ Critical Notes:

• 2001-2010 models use crossover pipes prone to cracking

• 2011+ (LML) has integrated manifold (different upgrade path)

• No emissions deletion occurs with proper crossover pipe upgrades

🛠️ Recommended Solutions:

1. LB7-LMM Owners:

   • Banks Techni-Cooler Crossover Pipe

   • PDP Bellowed Crossover Kit

   • Industrial Injection HD Pedestal

2. LML Owners:

   • Fleece Performance Turbo Outlet

   • Mishimoto Intercooler Pipes

Would you like:

• Specific part recommendations for your exact year?

• Installation difficulty ratings?

• Legal alternatives for emissions-compliant upgrades?

The Duramax exhaust path is significantly different from Power Strokes