Dorman 674-453 Exhaust Manifold - Left

Dorman 674-453 Exhaust Manifold for Mustang

This Dorman exhaust manifold is engineered to match the fit and function of the original part on specified Ford Mustang applications. Built from cast iron with an oval port shape, it is a direct-fit repair for the left side and includes the gaskets and downpipe hardware needed for a complete exhaust manifold service.

• Fits 1999 Ford Mustang, left
• Fits 2001 Ford Mustang, left
• Fits 2003-2004 Ford Mustang, left
• Cast iron construction for exhaust durability
• Natural finish with oval port shape
• Includes manifold gasket and mounting hardware
• Package contents: exhaust manifold, 1 manifold gasket, 3 studs, 3 nuts

OE-Style Replacement Design

Part number 674-453 is built to restore the original exhaust routing on Ford Mustang left-side applications. The manifold is precision-engineered for proper fitment and function, and the included gasket and downpipe hardware support a complete repair on 1999, 2001, 2003, and 2004 Mustang models. This part cross-references ATP 101166 for the same application.

Common Repair Uses

• Cracked or warped exhaust manifold replacement
• Exhaust leaks at the manifold-to-cylinder-head sealing surface
• Broken or damaged manifold studs and nuts during service
• Noisy exhaust operation from a failing left-side manifold
• Restoring proper exhaust flow on Ford Mustang V8 applications

Installation Notes

Verify left-side fitment before installation and inspect the cylinder-head sealing surface for damage or carbon buildup. Replace worn fasteners and clean mating surfaces thoroughly before installing the new gasket and manifold. Confirm downpipe alignment during assembly to help prevent exhaust leaks and stress on the mounting points.

Quality Assurance

Dorman manufactures this exhaust manifold to match original fit and function on specified vehicles. Part number 674-453 is designed as a direct replacement for the listed Ford Mustang applications and is built for regular-duty exhaust service.