aFe Large Bore-HD 5-Inch 409 Stainless Steel DPF-Back Exhaust with Polished Tip, Part Number 49-44085-P

Simple Installation: All systems use factory mounting locations providing stability and hassle-free installation. Leak-Free Seal: High quality band clamps are included for a complete 360 degree sealing surface. OE Fit: OE-style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions. The bayonet tip holds the hanger bushing in place for an OE-style fit that does not change with time. Flow and Performance: This Large Bore-HD exhaust system is constructed of 5" mandrel-bent 409 stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGT's. 6" Diameter Polished Intercooled Tip: Finishing off the exhaust is a 6" diameter, high luster polished, stainless steel slash cut tip with intercooling vents designed to reduce exhaust gas temperatures at the tailpipe. A unique stainless steel laser-cut powder-coated black aFe Power logo plate is riveted on for an aggressive style. Large Bore-HD 4 IN 409 Stainless Steel DPF-Back Exhaust System w/Polished Tip GM Diesel Trucks 17-19 V8-6.6L (td) L5P

• Massive Polished Stainless Steel Intercooled Tip
• Tip w/Laser Cut Stainless Steel aFe Power Badge
• Mandrel Bent 409 Stainless Steel Tubing
• Quick Hassle Free Installation
• Factory Mounting Locations
• High Quality Band Clamps
• OE Style Bayonet Hangers

Upgrade the exhaust flow and overall performance of your 2017–2019 GM diesel truck with the aFe Large Bore-HD DPF-back exhaust system, Part Number 49-44085-P. Designed for vehicles equipped with the Duramax 6.6L V8 L5P engine, this system replaces the exhaust components after the diesel particulate filter with smooth, mandrel-bent 409 stainless steel tubing. The large-bore design promotes efficient exhaust flow, helping reduce turbulence, lower exhaust gas temperatures, and support improved horsepower and torque.

Installation is straightforward because the system uses factory mounting locations and OE-style bayonet hangers to maintain secure pipe positioning during high vibration and high-heat operation. Included high-quality band clamps provide a complete 360-degree sealing surface for a dependable, leak-resistant connection. The exhaust is finished with a polished stainless steel slash-cut tip featuring integrated intercooling vents designed to help reduce exhaust temperatures at the tailpipe. A laser-cut, powder-coated black aFe Power logo plate adds a clean, aggressive appearance.

The aFe Large Bore-HD DPF-back exhaust fits select 2017–2019 Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD models with the Duramax 6.6L V8 L5P diesel engine. Verify vehicle configuration and model-year compatibility before installation. This product is not CARB approved and may not be legal for use on pollution-controlled vehicles in certain jurisdictions. Professional installation is recommended for best results.

What's Included

• Large Bore-HD 409 stainless steel DPF-back exhaust tubing
• Polished stainless steel intercooled exhaust tip
• High-quality band clamps
• OE-style bayonet hangers and installation hardware

Features:

• Simple Installation: Uses factory mounting locations for stable, hassle-free installation.
• Leak-Resistant Sealing: High-quality band clamps provide a complete 360-degree sealing surface.
• OE-Style Fitment: Bayonet hangers help maintain secure pipe placement during high vibration and high-heat conditions.
• High-Flow Performance: Mandrel-bent 409 stainless steel tubing promotes smooth exhaust flow, reduced turbulence, improved horsepower and torque potential, and lower exhaust gas temperatures.

Fitments:
2017 Chevrolet Silverado 2500 HD High Country
2017 Chevrolet Silverado 2500 HD LT
2017 Chevrolet Silverado 2500 HD LTZ
2017 Chevrolet Silverado 2500 HD WT
2017 Chevrolet Silverado 3500 HD High Country
2017 Chevrolet Silverado 3500 HD LT
2017 Chevrolet Silverado 3500 HD LTZ
2017 Chevrolet Silverado 3500 HD WT
2017 GMC Sierra 2500 HD Base
2017 GMC Sierra 2500 HD Denali
2017 GMC Sierra 2500 HD SLE
2017 GMC Sierra 2500 HD SLT
2017 GMC Sierra 3500 HD Base
2017 GMC Sierra 3500 HD Denali
2017 GMC Sierra 3500 HD SLE
2017 GMC Sierra 3500 HD SLT
2018 Chevrolet Silverado 2500 HD High Country
2018 Chevrolet Silverado 2500 HD LT
2018 Chevrolet Silverado 2500 HD LTZ
2018 Chevrolet Silverado 2500 HD WT
2018 Chevrolet Silverado 3500 HD High Country
2018 Chevrolet Silverado 3500 HD LT
2018 Chevrolet Silverado 3500 HD LTZ
2018 Chevrolet Silverado 3500 HD WT
2018 GMC Sierra 2500 HD Base
2018 GMC Sierra 2500 HD Denali
2018 GMC Sierra 2500 HD SLE
2018 GMC Sierra 2500 HD SLT
2018 GMC Sierra 3500 HD Base
2018 GMC Sierra 3500 HD Denali
2018 GMC Sierra 3500 HD SLE
2018 GMC Sierra 3500 HD SLT
2019 Chevrolet Silverado 2500 HD High Country
2019 Chevrolet Silverado 2500 HD LT
2019 Chevrolet Silverado 2500 HD LTZ
2019 Chevrolet Silverado 2500 HD WT
2019 Chevrolet Silverado 3500 HD High Country
2019 Chevrolet Silverado 3500 HD LT
2019 Chevrolet Silverado 3500 HD LTZ
2019 Chevrolet Silverado 3500 HD WT
2019 GMC Sierra 2500 HD Base
2019 GMC Sierra 2500 HD Denali
2019 GMC Sierra 2500 HD SLE
2019 GMC Sierra 2500 HD SLT
2019 GMC Sierra 3500 HD Base
2019 GMC Sierra 3500 HD Denali
2019 GMC Sierra 3500 HD SLE
2019 GMC Sierra 3500 HD SLT

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1