AFE Large Bore-HD 4" 409 Stainless Steel DPF-Back Exhaust System 20-25 GM 6.6L Duramax
Race / competition use only
This product is not legal for use on public roads or on pollution-controlled vehicles. By purchasing, you confirm it will be used only for off-road / race purposes and that you are responsible for lawful use.
Emissions-related component. Race/competition use only — not legal for use on public roads or on any pollution-controlled vehicle.
This product is vehicle-specific. Select your year, make, model, engine and transmission to confirm compatibility before adding it to your cart.
Select your truck to continue
Ships directly from the supplier. The final shipping cost will be shown before payment.
- Ships from aFe Power
Don’t hide the power of your engine behind a basic exhaust, upgrade to an exhaust that results in increased horsepower, improved throttle response, hassle free installation, and durable construction. What exhaust is this? Well, its aFe’s Large Bore-HD 4” 409 Stainless Steel DPF-Back Exhaust, specially made for your Duramax. What are the benefits? Reliability and durability, which will save you time and money in the long run by avoiding replacing your exhaust system. Not only that, but you can fly down the road in your truck with increased horsepower! What else is there to offer?
4" 409 Stainless Steel Construction:
This DPF-back exhaust system is constructed of 4" mandrel-bent 409 stainless steel tubing for maximum strength and durability.
Dual 5" Diameter Polished or Black Intercooled Exhaust Tips:
Finishing off this exhaust system are dual 5" diameter polished or black 304 stainless steel intercooled clamp-on exhaust tips. The tips features an aFe POWER logo plate riveted on for a unique style.
Installation:
Some cutting will be required, see instruction sheet for further information. Utilizing factory style hangers this system mounts directly to factory mounting locations for a hassle-free installation.
Integrated Mitered Merge Collector:
A mitered merge collector is used to decrease turbulence and increase exhaust velocity resulting in increased horsepower, torque and improved throttle response.
Computer-Aided Design:
Utilizing state-of-the-art computer-aided design technology, this exhaust system is designed for custom, high tolerance factory fitment.
MIG-Welded:
100% MIG-Welded for race-proven strength and durability.
Don’t hide the power of your engine behind a basic exhaust, upgrade to an exhaust that results in increased horsepower, improved throttle response, hassle free installation, and durable construction. What exhaust is this? Well, its aFe’s Large Bore-HD 4” 409 Stainless Steel DPF-Back Exhaust, specially made for your Duramax. What are the benefits? Reliability and durability, which will save you time and money in the long run by avoiding replacing your exhaust system. Not only that, but you can fly down the road in your truck with increased horsepower! What else is there to offer?
4" 409 Stainless Steel Construction:
This DPF-back exhaust system is constructed of 4" mandrel-bent 409 stainless steel tubing for maximum strength and durability.
Dual 5" Diameter Polished or Black Intercooled Exhaust Tips:
Finishing off this exhaust system are dual 5" diameter polished or black 304 stainless steel intercooled clamp-on exhaust tips. The tips features an aFe POWER logo plate riveted on for a unique style.
Installation:
Some cutting will be required, see instruction sheet for further information. Utilizing factory style hangers this system mounts directly to factory mounting locations for a hassle-free installation.
Integrated Mitered Merge Collector:
A mitered merge collector is used to decrease turbulence and increase exhaust velocity resulting in increased horsepower, torque and improved throttle response.
Computer-Aided Design:
Utilizing state-of-the-art computer-aided design technology, this exhaust system is designed for custom, high tolerance factory fitment.
MIG-Welded:
100% MIG-Welded for race-proven strength and durability.
Diesel Power Products directs warranty claims to the respective manufacturer; coverage and duration depend on that manufacturer and product. Its one-year manufacturer-defect warranty applies only to products manufactured by Power Products Unlimited Inc., not all products it sells. Manufacturer inspection is required; DPP does not pay inspection/return shipping or labor.
Return and warranty information is based on what Diesel Power Products offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Diesel Power Products warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what Diesel Power Products offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Race / competition use only. Not legal for sale or use on pollution-controlled vehicles or on public roads. Emissions-related component. Race/competition use only — not legal for use on public roads or on any pollution-controlled vehicle.
- Return eligibility
- Diesel Power Products states a 30-day window from receipt for eligible new, uninstalled, unopened and complete items in original packaging, with prior approval/RMA. Custom tuners and specified opened tools are excluded. Customer pays return shipping; original outbound shipping, including initially free shipping, is deducted. No standard restocking percentage is stated for ordinary approved returns. Based on what Diesel Power Products offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- Diesel Power Products
- Warranty duration
- Product-specific duration not stated; see supplier terms
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Competition use only
- Processing estimate
- 3–7 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- Diesel Power Products
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.