This set is compatible but not manufactured by Cummins but is a high quality aftermarket solution

Cummins 4bt 3.9 diesel Stainless hex head exhaust manifold bolt, turbo stud gasket set.

We carry many other stainless and gasket sets for these motors and many others. If you have any questions or need help finding a the kit for your application please feel free to contact us. We are not a silent seller on the internet, we highly value interaction with the people that love these motors.

****If you happen to need anything else, let us know. We will make it happen for you, if we can get it. Recommend a new kit we don't sell !? We'll send you one for free within reason. 

Included is top quality Victor Renz turbo and manifold gaskets along with top quality stainless socket bolts and turbo mount studs.  This set is what you need if your old bolts are corroded and rusted or you just want to clean up your engine. Using these will help keep your engine clean and serviceable for years to come. Top quality stainless that will hold up to the weather and the abuse that any real Diesel motor will see. Need anything else, let us know. We take every order very serious. 

*****Always use anti seize******