1999-2006 GMC Sierra 4.8L, 5.3L Manifold Headers Generic Pontiac This complete top end rebuild

This complete top end rebuild kit includes everything you need for a quick and effective top end repair: cylinder

7L Turbo Diesel Cummins

Unlike restrictive factory exhaust manifolds

5L 2003-2006 (NOT for 35th Anniversary Edition 2005)

1999-2006 GMC Sierra 4.8L, 5.3L Manifold Headers Generic Pontiac This complete top end rebuildProduct 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