EGR Valve Cooler Delete with 3.5" Downpipe Exhaust for 2017-2023 L5P 6.6L Duramax
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$369.99
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Product Information +
- Brand: DPFexhaust
- SKU: #12035
- Availability: Many in stock
- Product Type: EGR Delete Kit
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PLEASE NOTE!
Ultimate 2017-2023 L5P 6.6L Duramax EGR Delete with 3.5" Downpipe Exhaust | Restore Power & Max MPG
Upgrade to a solid carbon steel EGR delete kit, resisting up to 2,732°F to block soot and boost airflow. Paired with a high-flow downpipe, it reduces turbine backpressure, unlocks power, and allows higher boost—eliminating factory performance restrictions.
Key Features
- Optimized Exhaust Flow: Large 3.5-inch bore outperforms stock piping, slashing turbo lag and sharpening throttle response for instant power delivery.
- Turbo Spool Enhancement: Accelerates exhaust gas exit, cuts backpressure, and lets the turbine spin faster—boosting boost output and overall engine performance.
- Removes OEM Bottlenecks: Replaces the restrictive factory downpipe, eliminating the exhaust choke point and laying a solid base for tuning and higher boost.
- Durable High-Temp Build: Crafted from premium stainless steel with corrosion resistance, ensuring lasting reliability under extreme exhaust heat conditions.
- Advanced EGR Cooling Design: Engineered for faster, more efficient coolant recirculation. Features billet aluminum, nickel-plated steel, silicone hoses, zinc hardware, and precision O-rings.
EGR Delete Kit Specification
Downpipe Exhaust Specification
- Material: Stainless Steel
- Surface: Mirror Polish
OE vs. DPFexhaust Downpipe
| Feature | Stock Downpipe | DPFexhaust 3.5" Downpipe |
|---|---|---|
| Pipe Diameter | Narrow, restrictive | Large 3.5-inch high-flow mandrel bent |
| Surface Protection | Bare metal, prone to rust | Black ceramic coating, high-temp and anti-corrosive |
| Weld Quality | Spot-welded, uneven | Precision full TIG-welded flanges |
| Heat Management | None | Includes thermal wrap + stainless clamps |
| Flow Efficiency | High backpressure, turbo lag | Smooth, unrestricted flow—ideal for L5P downpipe delete builds |
What's the Difference Between a Downpipe and an Exhaust?
| Component | Function Description | Location |
|---|---|---|
| Downpipe | Connects turbo outlet to mid-pipe; manages hot gas flow | Immediately after the turbocharger |
| Exhaust System | Mid-section to tailpipe; reduces noise and handles emissions | From downpipe to tailpipe |
Upgrading the downpipe = performance and throttle response
Upgrading the exhaust = tone, flow, and backpressure control
Installation
2017-2023 L5P 6.6L Duramax EGR Delete Kit Instruction