Dorman 674-901 Exhaust Manifold - Left

Dorman 674-901 Exhaust Manifold

This Dorman exhaust manifold is built for direct replacement on select Buick, Chevrolet, Pontiac, and Saturn vehicles with a left-side exhaust manifold application. The cast iron construction, square port shape, and included heat shield support a repair that matches the original fit and function on the specified vehicles.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish with square port shape
• Includes gasket, heat shield, and mounting hardware
• Direct replacement for the original manifold on listed applications
• Cross-reference part numbers: 101460, 12603753
• Part number 674-901 for catalog and fitment lookup

Detailed Description

Designed as an OE-style replacement, this exhaust manifold is precision-engineered to match the fit and function of the original part on compatible vehicles. It is a left-side manifold for 2009-2011 Buick Lucerne, 2006-2011 Chevrolet Impala, 2006-2008 Chevrolet Uplander, 2006-2007 Buick Terraza, 2006-2007 Chevrolet Monte Carlo, 2006-2007 Saturn Relay, and 2006 Pontiac Montana. The included gasket and downpipe hardware support a complete exhaust repair, while the cast iron body helps maintain structural integrity under exhaust heat.

Part number 674-901 is a practical choice when replacing a cracked, warped, or leaking manifold on a Buick Lucerne, Chevrolet Impala, or other listed left-side applications. The square port design and included heat shield help maintain proper exhaust sealing and thermal management on the original vehicle layout.

What This Manifold Helps Fix

• Exhaust leaks at the manifold-to-cylinder head sealing surface
• Cracks or warping in the original cast manifold
• Broken or missing manifold-to-downpipe hardware
• Noise from a leaking left-side exhaust manifold
• Heat-related damage around the manifold area

Installation Notes and Tips

Verify left-side fitment before installation and compare the port shape, mounting points, and included hardware to the original part. Clean the sealing surfaces thoroughly, inspect the downpipe connection, and replace any damaged fasteners or gaskets during service. Confirm application details for 2006-2011 Chevrolet Impala, 2009-2011 Buick Lucerne, and other listed vehicles before beginning the repair.

Quality Assurance

Dorman manufactures this manifold to match original fit and function on the specified applications. The part includes the gasket, heat shield, and mounting hardware listed in the product data for a complete repair package.