Dorman Exhaust Manifold Hardware Kit 03413B — Direct-Fit Corrosion-Resistant Studs & Nuts

If your vehicle’s exhaust manifold mounting hardware is rusted, broken, or missing, this complete kit restores the necessary fasteners to achieve a proper seal and safe exhaust routing. Dorman engineered this kit to match original equipment specifications so you can replace worn components without having to source individual pieces. The kit is made from corrosion-resistant materials and assembled to provide long service life under heat and vibration typical of exhaust systems.

What components are included and why do they matter?

The kit contains replacement studs, nuts, washers, and retainers sized to match the original mounts for compatible vehicle models. Replacing all related pieces at once reduces the risk of future leaks and simplifies installation compared with hunting down individual parts.

• Replacement studs sized to original OE length and thread pitch
• High-temp nuts and locking retainers to resist loosening
• Washers and any specialty clips required for secure fit
• Components pre-selected to match manifold-to-head mating points

How does this kit perform under heat and vibration?

Dorman selects materials and finishes suitable for the extreme temperatures and cyclic loads at the exhaust manifold. The kit's components resist common failure modes—corrosion, thread wear and fastener relaxation—so the mounting maintains clamp load and sealing capability over time.

• Corrosion-resistant coatings reduce rust on studs and nuts
• Locking features help prevent fastener backing-off under vibration
• Materials rated for typical exhaust-system temperatures
• Proper thread engagement minimizes risk of stripping during torque-up

Will this kit fit my vehicle and how do I confirm compatibility?

This Dorman kit is produced to match the original hardware for specific makes and models. To ensure correct fitment, verify compatibility using your vehicle's exact year, make, model and engine using the seller’s garage or fitment tool before purchase.

• Check year, make, model and engine variant against the fitment tool
• Compare included stud lengths and thread sizes to the factory parts
• Contact support with VIN for final confirmation if uncertain
• Order the kit when the fitment tool lists your vehicle to avoid returns

How easy is installation and what tools are required?

Installation is straightforward for anyone comfortable with basic engine work: remove the old fasteners, clean sealing surfaces, and torque the new hardware to factory specifications. Some rusted studs may require penetrating oil or extraction tools; having a torque wrench and anti-seize compound on hand helps achieve a reliable assembly.

• Basic hand tools: sockets, extensions, ratchet and torque wrench
• Penetrating oil and extractor tools if old studs are seized
• Anti-seize compound recommended for stud threads where specified
• Replacement gasket(s) may be needed to complete the manifold service

Who is this for: The Dorman 03413B Exhaust Manifold Hardware Kit is intended for DIY mechanics, independent shops, and fleet technicians who need a complete, OEM-style replacement fastener set to restore exhaust manifold attachment. It's especially useful when original hardware is damaged by corrosion or when a full manifold service is being performed. Choose this kit if you want a matched set of studs, nuts and retainers engineered to the same fit and functional requirements as the factory parts, reducing installation time and lowering the chance of future exhaust leaks when paired with the correct gasket and proper torque technique.