PPE - Upgrade Manifold Stud & Nut Kit - 2017-2026 GM 6.6L L5P Duramax
Part # 116112503
The PPE 116112583 Exhaust Manifold Stud and Nut Kit is an excellent choice to replace vulnerable factory exhaust manifold bolts on Chevy Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax L5P engine. Upgrading to this kit eliminates the typical issues associated with stock exhaust hardware under heavy-duty thermal stress.
This hardware kit includes 16 studs and nuts for both stock manifolds. The class 10.9 studs are finished in black oxide coating for rust prevention.
- Prevents Fastener Snapping: Standard factory bolts cycle through extreme heat expansion and contraction, making them prone to stretching or snapping during removal. This kit uses a stud-and-nut setup, which distributes clamping force more evenly and reduces the risk of shearing off bolts inside the cylinder head.
- High-Strength Material: The hardware features Class 10.9 high-strength steel studs , specifically engineered to handle the severe pressures and extreme exhaust gas temperatures (EGTs) common in modified or heavy-towing diesel applications.
- Corrosion Resistance: Each piece is finished with a protective black oxide coating . This layer resists rust and corrosion, extending hardware longevity and simplifying future manifold or up-pipe maintenance.
- Complete, Direct-Fit Set: The kit includes 16 studs and 16 flange nuts , which is the exact amount required to fully refresh both the driver and passenger-side stock or aftermarket exhaust manifolds.
