Direct-fit American-sourced aluminized steel downpipe-to-back single-exit exhaust with 5" pipe diameter for 2015.5–2016 GM Duramax LML 6.6L (2500/3500). Mandrel-bent in Canada, 16‑gauge tubing with contour-bent hangers for OE clearance. 3‑bolt flange to V‑band options, improved flow and deeper tone while retaining bolt-on installation.
Kit will come standard with 3 bolt flange. If your down pipe requires a v band style clamp, slight modification to this exhaust will need to be made. Simply cut off the 3 bolt flange this kit comes with and reuse your factory v band clamp.
Key Features
- Fitment: 2015.5–2016 Chevrolet/GMC 2500 & 3500 with 6.6L Duramax LML
- Pipe Diameter: 5.00" (full 5-inch tubing from downpipe through mid/back section)
- Material: American-sourced aluminized steel, mandrel-bent in USA! 16-gauge tubing
- Hangers: Contour-bent hangers for OE clearance
- Clamps: Perfect Fit Lap Joint Exhaust Band clamps for a secure, leak-resistant direct-fit install
- Connection: 3‑bolt flange at turbo/downpipe and V‑band options where applicable
- Design: Downpipe-to-back single-exit, direct bolt-on, may require minor hanger alignment
- Performance: Maintains exhaust velocity, reduces drone, significantly lowers backpressure vs OEM (louder, more aggressive tone)
- Material guidance: Aluminized offers excellent value and everyday durability; stainless delivers maximum corrosion resistance for harsh climates. Sound and flow remain comparable between equivalent designs.
- Emissions: Check local regulations — may affect emissions/DPF systems
Specifications
- Configuration: Downpipe + mid/back section, single exit
- Nominal OD: 5.00" (aluminized tubing)
- Flange Types: 3‑bolt flange and/or V‑band (specify at order)
- Exit: Single rear/side exit (left/right option)
- Finish: Aluminized silver
- Tubing Gauge: 16‑gauge
Fitment Notes & Warnings
- Larger 5" diameter may not mate directly with some factory components (adapters may be required at turbo or tailpipe).
- May affect DPF/aftertreatment sensors and backpressure-dependent systems — consult tuner/installer.
- Professional installation recommended; may require custom hangers or clamp adapters.