2017-2023 6.6L GM Duramax L5P 5" Downpipe-Back Exhaust System

Slab Industries Diesel — 5" Downpipe-Back Exhaust | 6.6L GM Duramax L5P (2017–2026)

The full 5" downpipe-back system for your L5P Duramax. Built from T409 stainless steel with a 4-bolt flange connection, this system drops EGTs, unlocks exhaust flow, and delivers the deep aggressive tone your Silverado or Sierra deserves.

What you get

• Significantly reduced exhaust gas temperatures
• Maximum exhaust flow improvement downpipe-back
• Deep, aggressive diesel exhaust tone
• Bolt-on install with OE-style hangers
• Ships within the US

Specs

• Material: T409 Stainless Steel
• Diameter: 5 inches, downpipe-back
• Connection: 4-bolt flange
• Hangers: OE-style for easy installation

Fitment

• Engine: 6.6L Duramax L5P
• Years: 2017, 2018, 2019, 2020, 2021, 2022, 2023,
• Trucks: Chevrolet Silverado 2500/3500HD, GMC Sierra 2500/3500HD
• Does NOT fit Cab & Chassis trucks

Shipping & support

Ships within the US. Currently out of stock — email slabindustriesdiesel@gmail.com to be notified when back in stock or to confirm availability.