aFe Large Bore-HD DPF-Back Exhaust System (49-44125-P) fits 2020–2021 GM 6.6L trucks with 5" SS tubing and a 6" polished tip for high-flow performance. Built from 5" mandrel-bent 409 stainless steel, this exhaust system maximizes strength, durability, and exhaust flow. It finishes in a high-polish 304 stainless steel tip with an integrated aFe POWER logo for a sharp, performance-inspired appearance. OE-style bayonet hangers and factory mounting locations ensure easy installation with minimal modifications—though some cutting may be required depending on wheelbase.
Designed using CAD technology, this system is precision-engineered for an exact fit on multiple GM truck configurations. MIG-welded construction adds strength under race or towing conditions. The system includes a single side exit and does not include a muffler or catalytic converter.
Key Features :
Fits 2020–2021 GM 6.6L V8 diesel trucks with various cab and bed configurations
5" mandrel-bent 409 stainless steel tubing for long-lasting durability
Includes 6" polished 304 stainless steel tip with riveted aFe POWER badge
OE-style bayonet hangers ensure a stable fit under vibration and heat
Direct bolt-on installation using factory mounting points
No muffler included for a more aggressive exhaust tone
Designed to reduce exhaust gas temperatures and improve flow
Technical Notes:
Compatible with the following GM truck wheelbases:
Double Cab / Short-Bed – 149.4"
Crew Cab / Short-Bed – 158.9"
Double Cab / Long-Bed – 162.4"
Crew Cab / Long-Bed – 172"
Some cutting may be required. Refer to the official instruction sheet for fitment details.
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