2017-2026 Duramax 6.6 Stainless Steel Downpipe

Features: 3.5" Downpipe Full Stainless Steel Replaces Restrictive 'Crushed' OE Downpipe and Cat Connects to Factory Turbo Outlet Works with Any Aftermarket Race Exhaust System OR OEM System 4-Bolt Flange Manufactured by ProPower Diesel in the USA. IMPORTANT NOTEIn 2017, GMC made a production change in the connection between the catalytic converter and the turbo direct pipe on the L5P. Please ensure you have the newest 4-bolt style flange before ordering.