Dorman Exhaust Manifold Hardware Kit 03407B – OEM‑match bolts, studs & nuts (heat‑resistant, corrosion‑treated)

The Dorman 03407B Exhaust Manifold Hardware Kit is a complete set of OEM-matching fasteners engineered to replace missing or damaged bolts and studs that secure the exhaust manifold to the engine.

This hardware kit contains the specific fasteners used where the exhaust manifold meets the cylinder head so you can restore factory fit and function without scavenging mismatched parts. Dorman supplies this kit as a ready-to-install collection of components made from durable materials to withstand high heat and vibration common in exhaust systems. Use the vehicle-fit tool to confirm compatibility with your make, model and trim before purchase.

What parts are included and how do they match the original equipment?

The kit reproduces the original manifold fastener arrangement so you won't have to adapt different hardware or compromise alignment. Each piece is made to the same size and thread specifications as the factory items for a straightforward replacement.

• OEM-equivalent bolts, studs and nuts sized to factory specifications
• Heat-resistant metals chosen for exhaust-system conditions
• Corrosion-resistant finishes on critical components
• Packaged to keep fasteners organized for installation

How does this kit help during a manifold repair or gasket replacement?

Replacing worn or broken fasteners prevents leaks and ensures even clamp load across the manifold and gasket. Installing the matching hardware reduces the chance of stripped threads or improper torque that can occur when mixing old and new parts.

• Allows correct torque application for even sealing
• Removes need to reuse rusted or stretched fasteners
• Simplifies reassembly after gasket or manifold replacement
• Saves time compared with sourcing individual fasteners

Will these components withstand high-temperature exhaust conditions?

These fasteners are manufactured from materials selected to resist the elevated temperatures and vibration typical of exhaust systems. While every driving environment differs, the kit is designed to provide longer service life than corroded, fatigued originals.

• Heat-tolerant alloys for improved durability
• Finishes that reduce corrosion in exhaust environments
• Factory-style fit to minimize stress concentrations

How do I confirm this Dorman kit fits my vehicle?

Before ordering, use the online garage or fitment tool and enter your vehicle’s year, make, model and trim. That ensures the fastener count, lengths and thread pitches in the kit align with your engine’s manifold requirements.

• Cross-check part number 03407B with vehicle fitment tool
• Compare fastener quantities and lengths to removed hardware
• Contact support with your VIN for exact-fit verification if needed

Who is this for: The Dorman 03407B Exhaust Manifold Hardware Kit is aimed at DIY mechanics, professional technicians and fleet maintenance teams who need a dependable set of replacement fasteners when servicing exhaust manifolds or replacing gaskets. It’s a practical, cost-effective option whenever original hardware is missing, seized, or corroded and you want a correct-fit solution without hunting down individual parts.