Dorman 675-226 Exhaust Manifold Hardware Kit

Exhaust Manifold Hardware for OE-Style Repair

Dorman 675-226 is an exhaust manifold hardware kit built to match the original hardware used to secure the exhaust manifold to the engine on specified vehicles. It uses carbon steel construction and Class 10.9 bolt and stud grades for a standard replacement that supports reliable fastening in high-heat exhaust service.

Compatible With a wide range of Chevrolet, GMC, Cadillac, Buick, Pontiac, Saturn, Hummer, and select Buick/Chevrolet/GMC applications, this kit is a direct-fit hardware solution for exhaust manifold service on many GM platforms. Part number 675-226 is also referenced for OE-style replacement needs where the original manifold fasteners are being renewed.

Key Features

• OE-style exhaust manifold hardware kit for specified vehicles
• Carbon steel construction for strength in exhaust applications
• Class 10.9 bolt grade and Class 10.9 stud grade
• M8-1.25 thread size on both stud ends
• Black stud finish
• Standard replacement item grade
• Studs included; nuts, washers, and springs are not included
• Package contents: 6 bolts

Detailed Description

Dorman 675-226 is engineered to replace worn, damaged, or missing exhaust manifold fasteners with hardware that matches the original fitment requirements on listed vehicles. The kit uses coarse-thread M8-1.25 fasteners with carbon steel construction and a black finish, helping maintain secure clamping at the manifold-to-engine joint. For technicians servicing Chevrolet Silverado 1500, GMC Sierra 1500, Cadillac CTS, or Chevrolet Corvette exhaust systems, this hardware supports a clean manifold reinstallation using the correct thread specification and material grade.

This part cross-references 11546600 for the same application.

What It Helps Solve

• Broken or stretched exhaust manifold bolts
• Missing or corroded manifold fasteners
• Loose manifold attachment after exhaust service
• Improper thread match during manifold repair
• Repeat exhaust leaks caused by worn hardware

Installation Notes and Tips

• Verify vehicle application by year, make, and model before installation.
• Inspect the manifold, cylinder head threads, and mounting surfaces for damage before reassembly.
• Clean thread engagement points to help achieve proper fastener seating.
• Use the correct torque procedure for the specific engine and vehicle platform.
• Replace damaged manifold hardware as a matched set when service conditions require it.

Quality Assurance

This Dorman exhaust manifold hardware kit is made from quality materials for reliable performance and is supplied as a standard replacement part for specified applications.