1999-2004 Chevrolet Silverado 2500 Driver Side Exhaust Manifold Kit 674-522 Y2204 Cylinder Head L Side Cover

Cylinder Head L Side Cover Gasket: 12395-GB2-306

1 * Threaded Stud with Flange Nut and Stud Spacer

For GMC Sierra 1500  4

1 series E87 120d 5 doors 2003-2007

For 2017 GMC Sierra 1500 5

1999-2004 Chevrolet Silverado 2500 Driver Side Exhaust Manifold Kit 674-522 Y2204 Cylinder Head L Side CoverProduct Overview: 1. Exhaust headers are a key upgrade for boosting engine performance by improving airflow. Unlike restrictive factory exhaust manifolds, performance headers give each cylinder its own dedicated exhaust path, reducing back pressure and improving exhaust flow. 2. By minimizing exhaust interference between cylinders, headers help increase horsepower and torque. When paired with a high performance cold air intake and a cat back exhaust