PPE HIGH-FLOW EXHAUST MANIFOLDS WITH UP-PIPES - BLACK 116111220 | 2002-2004 6.6L Duramax LB7

Upgrade the restrictive factory exhaust manifolds and up-pipes on your GM 6.6L Duramax LB7 with the PPE 116111220 High-Flow Exhaust Manifolds & Up-Pipes. Engineered to maximize exhaust flow, reduce backpressure, and improve turbocharger efficiency, this premium system is designed to increase performance while maintaining long-term reliability.

The high-flow manifolds are constructed from durable high-silicon molybdenum cast iron and paired with heavy-duty stainless steel up-pipes featuring aircraft-grade internally sleeved bellows. The larger internal diameter and free-flowing design help lower exhaust gas temperatures, improve turbo spool-up, and support increased horsepower and fuel efficiency.

For additional thermal management and corrosion resistance, the manifolds and up-pipes feature a durable black ceramic coating. This advanced coating creates a thermal barrier that helps retain exhaust heat within the system, reduces underhood temperatures, minimizes thermal cycling, and protects against moisture, road salt, fuel, oil, and other corrosive contaminants.

Features:

• Black ceramic coated finish
• Significantly reduces exhaust backpressure
• High-silicon moly cast iron manifold construction
• Improves turbo spool-up and exhaust flow
• Helps reduce exhaust gas temperatures (EGTs)
• Supports increased horsepower and fuel efficiency
• Aircraft-grade stainless steel internally sleeved bellows
• Free-flowing stainless steel inner liner bellows
• 11-gauge stainless steel up-pipes with .120-inch wall thickness
• 2-inch outside diameter up-pipes
• Built-in bosses pre-drilled and tapped for 1/8" NPT EGT sensors
• Enhanced corrosion and heat resistance

Fitment:

• 2001–2004 GM 6.6L Duramax LB7

Important Notes:

• PPE 117000400 3" Stainless Steel Downpipe is required for installation.
• The factory downpipe is not compatible with this system.
• Cannot be shipped to California.