2011-2015 Downpipe Back 6.6L GM Duramax 2500 3500 LML Race Exhaust 5” or 4” SS409 with Tip

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Description

2011-2015 Downpipe Back 6.6L GM Duramax 2500 3500 LML Race Exhaust 5” or 4” SS409 with Tip4 5 Downpipe Back DPF & CAT Delete Exhaust System For 20112015 GM Duramax LML 6. 6L Unlock Raw Diesel Power Why Upgrade? Transform your 20112015 GM Duramax LML 2500 3500 into the powerhouse it was meant to be. This downpipe back race exhaust system is built to eliminate restrictive factory emissions components, increase horsepower & torque, improve fuel efficiency, lower EGTs, and deliver that aggressive diesel growl every Duramax owner loves. Whether

⚠️ Trucks with factory rear air suspension require modification for 5″ exhaust

Boosts power

💪 Built to Last – T-409 stainless steel construction

2017 & 2018 Dodge Ram 2500/3500 Cummins 6

Fuel Mileage Gains – Expect up to 18–19 MPG combined after deleting DPF/CAT (driving habits and larger tires may affect results)

Unlike cheap alternatives

Single Tunes for consistent performance

1 hour DIY install with basic hand tools

and delivers real-world horsepower and MPG gains — all backed by GDP’s proven tuning

tune your truck for maximum performance

Crafted from T-409 stainless steel

Crew Cab (short & long bed)⚠️ Not compatible with Cab & Chassis commercial trucks⚠️ V-Band flange only – If your truck uses a 3-bolt flange