Dorman 674-509 Exhaust Manifold

Durable Cast Iron Exhaust Manifold for Acura, Honda, and Isuzu

The Dorman 674-509 exhaust manifold is engineered to provide reliable exhaust flow for select Acura, Honda, and Isuzu vehicles. Designed with durable cast iron and including essential mounting hardware, this exhaust manifold ensures a proper fit and long-lasting performance for models like the Accord, CL, Oasis, and Odyssey.

Key Features of the Dorman 674-509 Exhaust Manifold

• Constructed from cast iron for strength and heat resistance
• Natural color finish with an oval port shape for optimized exhaust flow
• Includes mounting hardware, gasket, and heat shield for complete installation
• Regular grade type suitable for standard replacement needs
• Package contains exhaust manifold, one manifold gasket, two flange gaskets, and three studs

Detailed Description and Material Specifications

This exhaust manifold by Dorman is made from cast iron, a material known for its durability and ability to withstand high temperatures generated by engine exhaust gases. The natural finish maintains the integrity of the manifold without additional coatings. The oval port shape is designed to match the exhaust ports on compatible Acura, Honda, and Isuzu engines, ensuring efficient exhaust gas evacuation. The inclusion of a heat shield helps protect surrounding components from excessive heat, while the provided gaskets and mounting hardware simplify the installation process.

Compatible Vehicles and Common Applications

This exhaust manifold is compatible with the following makes and models:

• Acura Accord and CL
• Honda Odyssey
• Isuzu Oasis

It is commonly used to address issues such as:

• Exhaust leaks caused by cracked or warped manifolds
• Reduced engine performance due to exhaust flow restrictions
• Excessive engine noise from damaged exhaust components
• Failed emissions tests related to exhaust system integrity
• Corrosion or rust damage to the original manifold

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Use the included gaskets and mounting hardware for a secure, leak-free fit
• Torque all bolts to manufacturer specifications to prevent warping
• Inspect surrounding exhaust components for wear or damage during replacement
• Verify compatibility with your specific vehicle year and engine type before installation

Quality Assurance and Warranty Information

Dorman exhaust manifolds are manufactured to meet or exceed OEM standards for fit and function. The 674-509 part number undergoes rigorous quality control to ensure durability and performance. This product includes a limited warranty against defects in materials and workmanship, providing confidence in your replacement part.