Review on High-Quality GM 12617944 Exhaust Manifold Gasket for Optimal Performance by Terrance Singletary

Don't buy cheap exhaust manifold gaskets. This is one page, so you'll need two for our project. They are made from laminated MLS steel and can be reused for hundreds of thousands of miles. If you are doing an LS exchange and the originals are in poor condition, go ahead and replace them with new ones. They will last another 15 years worry-free. The number one cause of exhaust leaks on these engines is the weight of the exhaust system which causes fatigue on the brackets in the manifolds and you will often see soot around the front and rear bolts. I like to use a MIG welder to weld broken steel. Aluminum head cap screws as the wire feeder will not stick to the aluminum and replace factory style truck headstocks or whatever your application calls for.