aFe Large Bore-HD 4in 409SS DPF-Back Exhaust System for 20 GM Diesel Trucks V8-6.6L – with Polished Tips

This DPF-back exhaust system replaces the restrictive factory path with a high-flow, mandrel-bent 4" stainless layout that improves exhaust velocity, horsepower and throttle response for GM heavy-duty diesel trucks. Engineered using computer-aided design for precise, factory-style fitment, the system uses a mitered merge collector and factory-style hangers for a mostly direct-fit installation; finishing touches include dual 5" polished 304 stainless steel clamp-on intercooled tips with an aFe POWER logo plate for corrosion resistance and distinctive styling.

Features:

• Mandrel-bent 4" 409 stainless steel tubing
• Dual 5" polished 304 stainless steel tips
• aFe POWER logo plate riveted
• Mitered merge collector increases exhaust velocity
• 100% MIG-welded for race-proven strength
• Factory-style hangers for direct-fit installation
• Computer-aided design for high-tolerance fitment