1998-2018 Ram HD 5.9L/6.7L Cummins Exhaust Manifold Stud, Nut and Washer Kit (216110200)Description Upgrade the rusty or broken exhaust manifold bolts on your Cummins 5. 9L 6. 7L with the PPE Exhaust Manifold Stud, Nut and Washer Kit. Over time, repetitive heat cycles can take a toll on factory bolts, causing fatigue and stretching, ultimately resulting in troublesome exhaust leaks. Each PPE Manifold Stud is centerless ground and rolled with extreme precision, reducing stress concentrations, and increasing durability. The use of studs