Dorman 674-238 Exhaust Manifold - Left

Dorman 674-238 Exhaust Manifold

Dorman 674-238 is an OE FIX exhaust manifold built for drivers replacing a warped or cracked original manifold. Made from high-grade ductile iron, it is engineered to better manage heat and stress than lower-grade OE castings, helping restore proper exhaust flow and sealing on the affected application.

Key Features

• Exhaust manifold replacement for the Dorman OE FIX line
• High-grade ductile iron construction for improved heat and stress resistance
• Natural finish with square port shape
• Cast iron material specification
• Mounting hardware included for the listed application
• Gasket or seal included for installation
• Package contents include manifold, manifold gasket, flange gasket, studs, nuts, and springs

Detailed Description

This exhaust manifold is built to address common failure points seen in original equipment manifolds that can warp or crack over time. The Dorman 674-238 uses a stronger ductile iron design to help maintain sealing integrity under repeated heat cycles, making it a practical replacement for exhaust leaks and manifold damage on the correct vehicle application. If you are searching for a Dorman exhaust manifold for a GM application, or a direct-fit exhaust manifold replacement for 674-238, this part is built around durability-focused OE-style repair needs. This part cross-references ATP 101074 for the same application.

What It Helps Fix

• Exhaust leaks caused by a cracked manifold
• Warped manifold surfaces that affect sealing
• Ticking or puffing noises from the exhaust side
• Loss of exhaust backpressure control from manifold damage
• Failed gasket sealing at the manifold flange

Installation Notes

Verify manifold orientation, port shape, and gasket surfaces before installation. Replace damaged fasteners and clean the mating surfaces thoroughly to support a proper seal. Use the included gaskets and hardware only on the confirmed application, and follow factory torque specifications during assembly. For buyers comparing GM exhaust manifold replacement options, confirm the vehicle’s original manifold design before ordering Dorman 674-238.

Quality Assurance

Dorman positions this OE FIX manifold as a stronger replacement for original manifolds that fail from heat-related stress. The design focus is improved durability through upgraded iron construction and application-specific fitment details.