1998-2018 1998.5-2018 Bolt and Spacer Set for Cummins Exhaust Manifold 5.9L/6.7L (216110100)Description Upgrade the rusty or broken exhaust manifold bolts on your Cummins 5. 9L 6. 7L with the PPE Exhaust Manifold Bolt and Spacer 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 Bolt is centerless ground and rolled with extreme precision, reducing stress concentrations, and increasing durability. The use of Spacers