Dorman Driver Side Exhaust Manifold Kit 674-522 — Ductile Iron, Complete Gasket & Hardware Kit

The Dorman 674-522 driver side exhaust manifold kit is a direct-fit OE FIX replacement made from durable ductile iron and includes all required gaskets and hardware for a complete installation.

Many factory exhaust manifolds use lower-grade iron that can warp or develop cracks after repeated heating cycles. Dorman’s 674-522 kit addresses that weakness by offering a better material, matching fitment to original equipment, and providing the gaskets and fasteners you need to replace the manifold without searching for extra parts.

How does this manifold resist warping and cracking?

Unlike some original units that use brittle cast iron, this Dorman replacement is built from ductile iron, which absorbs stress and thermal cycling more effectively. The material choice reduces the likelihood of hairline fractures and deformation over time, extending the service life of the manifold.

• Ductile iron construction for improved tensile strength
• Engineered to withstand high heat and repeated cycles
• Fewer hot spots that lead to cracking

Will everything needed for installation be included?

The 674-522 kit is sold as a complete package so you won’t need to source additional gaskets or hardware. Dorman supplies the manifold plus the essential mounting components to streamline replacement and avoid installation delays.

• New manifold gasket and flange gasket included
• Three studs and three nuts supplied for secure installation
• Direct-fit design reduces need for modification

How closely does this match the original part and fit my vehicle?

Each Dorman OE FIX product is reverse engineered from the original equipment part to deliver a dimensional and functional match. For accurate fitment, use your vehicle make, model and trim in the seller’s garage tool before purchase.

• Reverse-engineered to mirror OEM geometry
• Designed and tested in the United States for quality control
• Verify compatibility with the garage lookup tool prior to ordering

What should I expect during and after installation?

Because the kit is a direct-fit replacement and includes gaskets and fasteners, installation time is typically similar to swapping the original manifold. After proper torquing and sealing, you should experience stable exhaust routing without leaks attributable to warped or cracked manifolds.

• Includes necessary hardware to simplify installation
• Follow manufacturer torque specs for studs and nuts
• Inspect mating surfaces and replace any damaged components

Who is this for: The Dorman 674-522 driver side exhaust manifold kit is intended for vehicle owners and mechanics replacing a warped, cracked, or failed factory manifold on compatible models. It’s a practical choice for those who want an OEM-style fit without sourcing separate gaskets or studs, and for anyone preferring an upgraded ductile iron construction for longer durability.