2008 Chevy Silverado Buildup - Power & Sound

A strong tug later and Brian pulled the exhaust manifolds free and set them aside.

On the driver side, the manifolds were pulled free from underneath the truck. The steering shaft and brackets make it much more difficult to access it from the top.

Using a Scotch-brite pad, the exhaust ports on the cylinder head were scuffed and cleaned to ensure a flush and true seal with the new Gibson headers.

Out of the boxes from autoanything.com, the new Gibson headers looked ready to make our Chevy run like a race horse. Made from stainless steel and 50-state legal, the headers are a must for performance enthusiasts or for guys who tow.

Side-by-side, it's no wonder the new Gibson headers out-flow and hence, out-perform the factory manifolds.

A quick dab of Loctite on the header bolts will help them stay put during extreme heat cycles.

Supplied in the kit, the header gaskets were then placed on the Gibson headers and the headers slipped into place on the engine.

Fortunately on the passenger side, the Gibson headers went on with no problem.

Each header bolt was then torqued from the middle outward.

Brian then reinstalled the factory plug wires.

Underneath the truck, the crossover pipe was reconnected and the bolts tightened. The oxygen sensor harnesses were then reconnected.

Moving onto the factory exhaust system, the front lead pipe was unbolted from the collector and the rest of the system unhooked from the hangers and pulled free.