Dorman 674-556 Exhaust Manifold

Durable Cast Iron Exhaust Manifold for Geo and Toyota Vehicles

The Dorman 674-556 exhaust manifold is engineered to provide reliable exhaust flow for select Geo and Toyota models. Designed with durable cast iron and including all necessary mounting hardware, this exhaust manifold ensures a secure fit and long-lasting performance for your vehicle.

• Constructed from cast iron for strength and heat resistance
• Natural color finish with round port shape for optimal exhaust flow
• Includes exhaust manifold, gasket, flange, 4 studs, and 4 nuts for complete installation
• Comes with a heat shield to protect surrounding components
• Compatible with Geo Celica, Toyota Corolla, and Toyota Prizm models

Product Features and Specifications

This Dorman exhaust manifold (part number 674-556) 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 material without additional coatings. The round port shape is designed to match the exhaust ports on compatible Geo and Toyota engines, ensuring efficient exhaust gas evacuation.

Included in the package are all necessary mounting components: one manifold gasket and flange, four studs, and four nuts, simplifying the installation process. Additionally, the heat shield included helps to reduce heat transfer to nearby engine parts, protecting sensitive components and improving overall engine bay safety.

Compatible Vehicles and Applications

This exhaust manifold is specifically compatible with the following vehicles:

• Geo Celica
• Toyota Corolla
• Toyota Prizm

It is designed to replace the original exhaust manifold on these models, restoring proper exhaust flow and engine performance.

Common Issues Addressed by This Exhaust Manifold

• Exhaust leaks caused by cracked or warped manifolds
• Reduced engine performance due to damaged exhaust ports
• Excessive engine bay heat from missing or damaged heat shields
• Corrosion or rust compromising exhaust manifold integrity
• Failed emissions tests related to exhaust system leaks

Installation Notes and Tips

When installing the Dorman 674-556 exhaust manifold, ensure all old gasket material is thoroughly cleaned from the mounting surface to prevent leaks. Use the included gasket and hardware for a secure fit. Torque the nuts and studs to manufacturer specifications to avoid warping the manifold. The included heat shield should be properly positioned to protect adjacent components from heat damage.

Quality Assurance and Warranty

Dorman exhaust manifolds are manufactured to meet or exceed OEM standards for fit and function. The 674-556 part is backed by Dorman's quality assurance processes, ensuring reliable performance. This product includes a limited warranty covering defects in materials and workmanship under normal use.