• PPE HIGH-FLOW EXHAUST MANIFOLDS WITH UP-PIPES 116111400 | 2004.5-2005 6.6L Duramax LLY
  • PPE HIGH-FLOW EXHAUST MANIFOLDS WITH UP-PIPES 116111400 | 2004.5-2005 6.6L Duramax LLY
  • PPE HIGH-FLOW EXHAUST MANIFOLDS WITH UP-PIPES 116111400 | 2004.5-2005 6.6L Duramax LLY
  • PPE HIGH-FLOW EXHAUST MANIFOLDS WITH UP-PIPES 116111400/116111420/116111435 | 2004.5-2005 6.6L Duramax LLY - WWM Performance
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Pacific Performance Engineering

PPE HIGH-FLOW EXHAUST MANIFOLDS WITH UP-PIPES 116111400/116111420/116111435 | 2004.5-2005 6.6L Duramax LLY

PPE HIGH-FLOW EXHAUST MANIFOLDS WITH UP-PIPES 116111400/116111420/116111435 | 2004.5-2005 6.6L Duramax LLY

116111400

$1,121.39 USD

SELECT FITMENT

See If This Product Fits Your Vehicle

While many of our products are stocked in our warehouse, inventory levels can change quickly. If you need to confirm availability before placing your order, please call or text 970-778-0792.

Increase exhaust flow and reduce backpressure in your 2004.5–2005 GM 6.6L Duramax LLY with the PPE 116111400, 116111420, and 116111435 High-Flow Exhaust Manifolds & Up-Pipes. Engineered to deliver improved performance and long-term durability, this system provides up to 20% greater exhaust flow than the factory components while maintaining 50-state emissions compliance.

Constructed from high-quality cast iron, the manifolds are built to withstand years of demanding use. The included stainless steel up-pipes feature aircraft-grade internally sleeved bellows with an increased inner diameter to improve exhaust flow, reduce restriction, and enhance turbocharger efficiency.

The system is also equipped with built-in bosses that are pre-drilled and tapped for 1/8-inch NPT EGT probes, making it easy to monitor exhaust gas temperatures in performance and towing applications.

Features:

  • Increases exhaust flow by up to 20%
  • Significantly reduces exhaust backpressure
  • High-strength cast iron manifold construction
  • Heavy-duty stainless steel up-pipes
  • Free-flowing stainless steel inner liner bellows
  • Aircraft-grade internally sleeved bellows design
  • 11-gauge stainless steel up-pipes with .120-inch wall thickness
  • Built-in bosses pre-drilled and tapped for 1/8" NPT EGT sensors
  • Designed for improved turbocharger performance and durability
  • 50-state emissions legal

Emissions Compliance:

  • CARB Executive Order: D-701-1

Fitment:

  • 2004.5–2005 Chevrolet Silverado 2500HD/3500HD 6.6L Duramax LLY
  • 2004.5–2005 GMC Sierra 2500HD/3500HD 6.6L Duramax LLY
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