Dorman Exhaust Manifold Kit with Gaskets and Hardware for 2003‑96 Chevrolet, GMC, Isuzu & 2005‑00 Workhorse (Part 674‑860)

Exhaust manifold kit for 2003-96 Chevrolet, GMC, Isuzu and 2005-00 Workhorse with gaskets and hardware.

Built to meet the manufacturer’s design intent for reliable service.

Key Features

• Includes required gaskets and downpipe hardware for a complete repair.
• Precision-engineered to match original manifold fit and function.
• Durable manufacturing ensures long-lasting performance.
• All necessary components included in the kit.

Benefits

• Provides a full replacement solution without missing parts.
• Saves time on installation by including all hardware.
• Ensures reliable exhaust flow and engine performance.
• Reduces risk of future repairs with durable construction.

Application

Ideal for owners of 2003-96 Chevrolet, GMC, Isuzu models and 2005-00 Workhorse vehicles needing a complete manifold replacement.

Fitment Notes

• Chevrolet 2003‑96
• GMC 2003‑96
• Isuzu 2003‑96
• Workhorse 2005‑00
• Workhorse Custom Chassis 2004‑00

Why Choose Dorman - OE Solutions?

• Choosing Dorman aftermarket replacement parts is a smart way to restore your vehicle with confidence, thanks to a strong focus on fit, durability, and dependable performance. Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function, helping ensure a smoother installation and reliable results. Built with quality materials and validated through testing, they’re made to stand up to daily driving demands and help reduce the risk of repeat repairs. For a long-lasting fix you can trust, Dorman delivers proven aftermarket solutions that keep your vehicle operating the way it should.

What’s in the Box

• Included items not specified by the manufacturer.

Item Dimensions