4" Downpipe-Back DPF Delete Exhaust System for 2015.5-2016 Chevy GMC LML 6.6L Duramax
Secure and trusted checkout with
Product Information +
- Brand: SPEtuner
- SKU: #12113
- Availability: Many in stock
- Product Type: DPF & Cat Delete Pipe
-
PLEASE NOTE!
Fast Shipping
1-Year Warranty
30-Day Returns
Secure Checkout
SPEtuner 4" Downpipe-Back DPF Delete Exhaust System | 2015.5-2016 GM 6.6L Duramax (LML)
Unleash the true potential of your 2015.5–2016 Chevy/GMC 2500HD/3500HD 6.6L LML Duramax with the SPEtuner 4-Inch Downpipe-Back DPF Delete Kit. Designed to eliminate the restrictive factory Diesel Particulate Filter (DPF) and aftertreatment system, this free-flowing upgrade dramatically reduces exhaust backpressure, lowers EGTs (Exhaust Gas Temperatures), and prevents endless clogged regeneration cycles. Crafted from heavy-duty, corrosion-resistant steel and precision mandrel-bent for maximum airflow, it optimizes turbo spool-up, improves fuel economy, and delivers an aggressive diesel tone. Built strictly for off-road and race performance.
Note: For off-road/competition use only. Not compatible with emissions sensors or Cab & Chassis models. Does not include a tip. Tuning required for optimal performance.
Key Features
- Maximum Flow & Efficiency: Replaces the restrictive factory DPF and cat assembly with a straight-through downpipe-back layout to eliminate choking points and optimize exhaust scavenging.
- Lower Exhaust Gas Temperatures (EGTs): Enhances thermal efficiency, keeping operating temperatures safely lower during heavy towing and sustained high-load driving.
- Improved Fuel Economy & Throttle: Reduces engine drag caused by factory emissions equipment, translating to sharper throttle response and better fuel mileage.
- Heavy-Duty Durability: Constructed from premium, corrosion-resistant materials designed to withstand extreme thermal cycles and harsh under-truck environments.
- Direct Bolt-On Fitment: Engineered using precise OE-routing data for a seamless fit into factory hangers without requiring custom cutting or welding.
Why Choose SPEtuner Duramax Performance?
Don't risk your heavy-duty truck on cheap, thin-walled pipes that crack or leak exhaust under high boost. SPEtuner builds hardware designed to endure:
- Duramax LML Specialists: Engineered specifically for the 6.6L LML platform to resolve common emissions-related choking issues and recurring regeneration failures.
- Rigorously Tested: Precision CNC mandrel-bent tubing ensures leak-free connections and optimal structural integrity under high boost and pressure.
- Professional Performance: Delivers track-proven airflow gains, eliminating factory restrictions without sacrificing long-term reliability.
- Value & Support: High-end aftermarket performance quality backed by reliable customer care and enthusiast-focused design.