If you're looking for an exhaust manifold gasket set that won't let you down, Cometic's C5726-040 is the perfect choice. This set is designed specifically for 5.9 Cummins engines from 1998.5 to 2007, and it provides a tight seal that won't burn through or push out over time. Plus, there's no need for any sealants - just install and forget. So if you want a dependable gasket set that will keep your engine running smoothly for years to come, Cometic's C5726-040 is the way to go.