Exhaust Manifold Bolt Bracket for 1999 and newer GM trucks and SUVs with 4.8, 5.3, 6.0, or 6.2 L engines Compatibility and fit Engine compatibility: 4.8 L, 5.3 L, 6.0 L, and 6.2 L engines. Vehicle makes/models covered: Silverado, Sierra, Yukon, Denali, Escalade, Hummer. Bolt positions: Driver's side rearmost bolt and Passenger side frontmost bolt. No head removal required and leak prevention No need to remove the cylinder head or drill out broken bolts. Replaces broken exhaust manifold bolts to clamp the exhaust manifold securely to the cylinder head. Designed to eliminate exhaust leaks at the manifoldtohead joint. Quality, materials, and compatibility with OEM standards 100% brand and . Easy to install. Made of carbon steel and built to meet or exceed OEM standards. Designed to resist failure from heat and the expansion of the exhaust manifold. Function and performance Primary purpose: stop exhaust leaks between the exhaust manifold and the cylinder head. Provides a secure clamp to maintain manifold position and seal. Use scenarios Scenario 1: You detect an exhaust leak at the manifoldhead joint caused by broken bolts. Install the bracket to restore a secure seal without removing the cylinder head. Scenario 2: You have a broken exhaust manifold bolt that cannot be easily removed. Use the bracket as a replacement clamp to resecure the manifold to the head and stop the leak. Scenario 3: During routine exhaust manifold service on 1999 GM V8 engines, install the bracket to ensure a reliable seal and reduce the risk of future leaks without engine disassembly.