PPE HIGH-FLOW EXHAUST MANIFOLDS WITH UP-PIPES 116111200 | 2002-2004 6.6L Duramax LB7

Improve exhaust flow and reduce backpressure in your 2002–2005 GM 6.6L Duramax LB7 or LLY with the PPE 116111200 High-Flow Exhaust Manifolds & Up-Pipes. Engineered for increased performance and long-term durability, this system delivers up to 20% greater exhaust flow compared to factory components while maintaining emissions compliance.

The manifolds are constructed from high-quality cast iron for exceptional strength and longevity, while the included up-pipes feature heavy-duty stainless steel construction with aircraft-grade internally sleeved bellows. The larger inner diameter and high-flow design help improve exhaust gas movement, reduce restriction, and support improved turbocharger efficiency.

For enthusiasts who monitor exhaust temperatures, the manifolds are pre-drilled and tapped with a 1/8-inch NPT port for convenient EGT probe installation.

Features:

• Increases exhaust flow by up to 20%
• Reduces exhaust backpressure
• High-strength cast iron exhaust manifolds
• Heavy-duty stainless steel up-pipes
• Aircraft-grade internally sleeved bellows
• Stainless steel inner liner bellows for enhanced durability
• 11-gauge stainless steel up-pipes with .120-inch wall thickness
• Pre-drilled and tapped 1/8" NPT port for EGT gauge installation
• Designed for long service life
• 50-state emissions legal

Emissions Compliance:

• CARB Executive Order: D-701-1

Fitment:

• 2002–2004 GM 6.6L Duramax LB7
• 2004.5–2005 GM 6.6L Duramax LLY