Dorman 674-509 Exhaust Manifold

Exhaust Manifold for Acura, Honda, and Isuzu

This Dorman exhaust manifold is precision-engineered to match the fit and function of the original part on specified vehicles. Built from cast iron with a natural finish, it includes the gasket and downpipe hardware needed for a complete exhaust manifold repair.

• Cast iron construction for durable exhaust service
• Natural finish with oval port shape
• Heat shield included
• Gasket or seal included for sealing surfaces
• Mounting hardware included
• Package contents: exhaust manifold, manifold gasket, flange gaskets, studs, and nuts

Fitment and Application Details

Compatible with 1994-1997 Honda Accord, 1995-1998 Honda Odyssey, 1996-1999 Isuzu Oasis, and 1997-1999 Acura CL. This Dorman 674-509 is built for direct replacement service on these listed applications and is a practical choice when replacing a cracked, warped, or leaking exhaust manifold.

This part cross-references ATP 101253 for the same application.

What This Repair Can Address

• Exhaust leaks at the manifold or flange
• Cracked or heat-damaged manifold casting
• Broken or corroded manifold studs and nuts
• Failed gasket sealing at the cylinder head or downpipe connection
• Noise, odor, or performance issues caused by manifold leakage

Installation Notes and Tips

Inspect the cylinder head sealing surface, flange surfaces, and fasteners before installation. Replace damaged studs or hardware during service, and verify that the heat shield and gaskets are positioned correctly before tightening to specification. Confirm vehicle application by year, make, and model before ordering Dorman 674-509.

Quality Assurance

Dorman manufactures this exhaust manifold to match original fit and function on the listed vehicles. The cast iron construction, included sealing components, and supplied hardware support a complete exhaust manifold replacement on compatible Honda Accord, Honda Odyssey, Isuzu Oasis, and Acura CL applications.