Dorman 674-803 Exhaust Manifold

Exhaust Manifold for Scion and Toyota Applications

This Dorman exhaust manifold, part number 674-803, is engineered to match the fit and function of the original manifold on specified vehicles. It is built from stainless steel and includes the gaskets and downpipe hardware needed for a complete exhaust manifold repair on select Scion xA, Scion xB, and Toyota Echo models.

• Direct-fit exhaust manifold for specified Scion and Toyota applications
• Stainless steel construction with a natural finish
• Round port shape for OE-style exhaust connection
• Includes gasket and seal components for the repair
• Mounting hardware included for installation
• Part number 674-803 for easy identification

Fitment Details

• Fits 2004-2006 Scion xA, N/A
• Fits 2004-2006 Scion xB, N/A
• Fits 2000-2005 Toyota Echo, N/A

Product Overview

Dorman 674-803 is a replacement exhaust manifold designed for vehicles that need a serviceable OE-style manifold assembly. The stainless steel body helps provide durable exhaust routing, while the round port shape supports proper alignment at the cylinder head and exhaust connection points. This manifold is a practical choice for a Toyota Echo exhaust manifold replacement or a Scion xA exhaust manifold replacement when the original part is cracked, warped, or leaking. It also serves as a Scion xB exhaust manifold replacement for the listed model years.

This part cross-references ATP 101555 for the same application.

Common Repair Issues

• Exhaust leaks at the manifold or flange
• Cracked or warped original manifold
• Broken or corroded manifold hardware
• Failed gasket sealing surfaces
• Noise or odor caused by manifold leakage

Installation Notes and Tips

Inspect the cylinder head and exhaust flange surfaces before installation and clean away old gasket material. Replace damaged fasteners or worn sealing surfaces as needed, and verify alignment of the manifold, gaskets, and downpipe connection before final tightening. Confirm vehicle application by year, make, and model before ordering part number 674-803.

Quality Assurance

Dorman manufactures this manifold to match the original fit and function on the listed vehicles. The included gasket and hardware components support a complete repair using OE-style replacement parts.