Steed Speed Upgraded Replacement Exhaust Manifold For 4BT 3.9L Cummins 2023-2025 GMC Sierra 3500 5" mandrel-bent tubing improves airflow

5" mandrel-bent tubing improves airflow and performance

1998-2002 Pontiac Firebird V6 3

Constant-tension worm gear clamps keep a strong grip as pipes and boots expand and contract

If your truck

Note: With snow plow package

Steed Speed Upgraded Replacement Exhaust Manifold For 4BT 3.9L Cummins 2023-2025 GMC Sierra 3500 5" mandrel-bent tubing improves airflowSteed Speed Upgraded Replacement Exhaust Manifold For 4BT 3. 9L Cummins Steed Speed Manifolds are CNC Machined from 1018 Mild Steel Billet and finished with a satin black coating of Techline, these aren't your typical cheap cast or tubular manifolds. Steed Speed engineers some of the finest manifolds on the planet. The Techline coating is capable of handling up to 1700 degrees continuously and up to 2000 degrees for short periods. Steed Speed