Dorman 674-653 Exhaust Manifold - Right

Durable Cast Iron Exhaust Manifold for GM Vehicles

The Dorman 674-653 exhaust manifold is engineered to provide reliable exhaust flow for select Buick, Chevrolet, Oldsmobile, and Pontiac models. Constructed from cast iron with a natural finish, this exhaust manifold is designed to withstand high temperatures and deliver consistent performance.

• Material: Heavy-duty cast iron for durability and heat resistance
• Color: Natural cast iron finish
• Port Shape: Square ports for optimal exhaust flow
• Includes mounting hardware, gasket, studs, nuts, and heat shield
• Grade Type: Regular quality standard for dependable operation

Product Details and Specifications

This exhaust manifold (part number 674-653) features a square port design that matches factory specifications for a proper seal and efficient exhaust gas evacuation. The package includes the exhaust manifold itself, one manifold gasket and flange, two studs, two nuts, and a heat shield to protect surrounding components from excessive heat. The cast iron construction ensures resistance to warping and cracking under thermal stress, making it suitable for vehicles such as the Buick LeMans, Chevrolet Impala, Oldsmobile Cutlass, and Pontiac Grand Prix.

Compatible Vehicles and Applications

This Dorman exhaust manifold is compatible with a range of GM vehicles, including:

• Buick Bonneville, Century, LeMans, Regal
• Chevrolet Caprice, El Camino, Impala, Malibu, Monte Carlo
• Oldsmobile Cutlass, Cutlass Calais, Cutlass Cruiser, Cutlass Supreme
• Pontiac Grand Am, Grand LeMans, Grand Prix, Parisienne

Common Issues Addressed by This Exhaust Manifold

• Exhaust leaks caused by cracked or warped manifolds
• Reduced engine performance due to improper exhaust flow
• Excessive engine noise from damaged or missing manifolds
• Failed emissions tests related to exhaust system leaks
• Overheating of engine components due to missing heat shield

Installation Notes and Tips

Installation of the Dorman 674-653 exhaust manifold should be performed with care to ensure proper sealing and fitment. Use the included gasket and mounting hardware to secure the manifold firmly to the engine block. Torque specifications should follow manufacturer guidelines to prevent leaks or damage. The included heat shield must be installed to protect nearby components from heat exposure. It is recommended to inspect related exhaust components during installation for wear or damage.

Quality Assurance and Warranty

Dorman exhaust manifolds are manufactured to meet or exceed OEM standards for fit, form, and function. The 674-653 part undergoes quality checks to ensure durability and performance. This product includes a limited warranty covering defects in materials and workmanship under normal use conditions. Refer to Dorman's warranty policy for specific terms and coverage details.