Dorman 674-544 Exhaust Manifold - Front

OE-Style Exhaust Manifold Replacement

Dorman 674-544 is a cast iron exhaust manifold engineered to match the fit and function of the original manifold on specified vehicles. It includes the gasket, flange, studs, nuts, and heat shield needed for a complete front exhaust manifold repair on select Buick, Chevrolet, Oldsmobile, and Pontiac models.

Compatible with front exhaust manifold applications on 1993-2004 Buick Century, Regal, and Skylark; Chevrolet Corsica, Lumina, Lumina APV, Malibu, Impala, Monte Carlo; Oldsmobile Achieva, Cutlass, Cutlass Ciera, Cutlass Supreme, Alero, Silhouette; and Pontiac Grand Am, Grand Prix, Trans Sport, Montana, Aztek.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish with irregular port shape
• Includes gasket or seal and heat shield
• Mounting hardware included for the repair
• Packaged for front-position exhaust manifold replacement
• Cross-references OE-style part numbers 101275 and 10182321

Detailed Description

This Dorman exhaust manifold is built for direct replacement on listed vehicles and follows the original fit and function of the factory part. The cast iron body supports high-temperature exhaust operation, while the included gasket, flange, studs, nuts, and heat shield help complete the repair without sourcing separate core components. Dorman 674-544 is a practical choice for front manifold service on vehicles such as the Chevrolet Impala, Pontiac Grand Prix, and Buick Century.

Common Repair Issues

• Exhaust leaks at the manifold-to-cylinder-head sealing surface
• Cracked or warped factory manifold casting
• Broken or missing manifold studs and flange hardware
• Noise from a leaking front exhaust manifold
• Failed gasket or heat shield at the manifold assembly

Installation Notes

Verify engine and front-position fitment before installation. Inspect the cylinder-head sealing surface, exhaust flange, and fastener threads for damage before assembly. Replace any worn mating surfaces and follow the vehicle service procedure for torque sequence and heat-cycle recheck. This part is intended for front exhaust manifold applications only on the listed vehicles.

Quality Assurance

Dorman manufactures this manifold to match original equipment fit and function on specified applications. The cast iron construction and included service components support a complete front manifold repair for the listed Buick, Chevrolet, Oldsmobile, and Pontiac vehicles.