Dorman 674-101 Exhaust Manifold

Dorman 674-101 Exhaust Manifold

This Dorman exhaust manifold is precision-engineered and durably manufactured to match the fit and function of the original manifold on specified vehicles. It is built for direct replacement service on select Buick, Chevrolet, Oldsmobile, and Pontiac applications, including 1985-1987 Buick Century, 1985-1987 Buick Skylark, and 1985-1987 Chevrolet Celebrity.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish
• Square port shape
• Heat shield included
• Gaskets included for a complete repair
• Mounting hardware included
• Direct replacement for specified OE applications

Detailed Description

The Dorman 674-101 exhaust manifold is built to restore proper exhaust routing on compatible vehicles while matching the original manifold’s fit and function. Its cast iron construction supports long-term durability, and the square port design follows the factory-style exhaust interface used on the listed applications. This part cross-references ATP 101077 for the same application. It is a practical replacement choice for drivers servicing 1985-1987 Buick Century, 1985-1987 Chevrolet Celebrity, and related GM compact and midsize platforms.

Compatible With 1985-1987 Buick Century, 1985-1987 Buick Skylark, 1985-1987 Chevrolet Celebrity, 1985-1987 Oldsmobile Calais, 1985-1987 Oldsmobile Cutlass Ciera, 1987 Oldsmobile Cutlass Cruiser, 1985-1987 Pontiac 6000, 1987 Pontiac Fiero, 1985-1987 Pontiac Grand Am, and 1985 Chevrolet Citation II. Part number 674-101 is also listed under interchange reference 10041215.

What It Helps Address

• Cracked or warped exhaust manifold housing
• Exhaust leaks at the manifold or flange connection
• Damaged gasket sealing surfaces
• Broken or missing downpipe attachment hardware
• Heat-related exhaust noise from a failing manifold assembly

Installation Notes and Tips

Verify engine and exhaust configuration against the vehicle listing before installation. Use the included gaskets and hardware during assembly, and inspect the cylinder head and downpipe mating surfaces for damage or carbon buildup before tightening. Proper torque sequence and a clean sealing surface help support a secure exhaust seal.

Quality Assurance

Dorman manufactures this manifold to match original fit and function on the specified vehicles. The part is built from cast iron and includes the sealing components and heat shield needed for a complete repair on listed applications.