Dorman Exhaust Manifold Hardware Kit 03407B — Complete OEM-Fit Bolts, Studs & Nuts

Dorman 03407B Exhaust Manifold Hardware Kit provides the replacement bolts, studs, nuts and necessary fasteners to securely mount an exhaust manifold to the engine, matching OEM fit and function.

When an exhaust manifold’s mounting hardware corrodes, strips or goes missing, the leak risk and vibration can grow quickly. The Dorman 03407B kit contains the hardware designed to match the original factory configuration for the specified vehicles, made from materials selected to resist the heat and corrosive conditions typical of exhaust systems. This description explains what’s in the kit, how it installs, and whether it’s the right choice for your repair.

What components come in this Dorman kit and how do they compare to the original parts?

The 03407B kit includes the fasteners required to replace worn or damaged manifold mounting hardware so you don’t have to reuse corroded bolts or studs. Dorman engineers the pieces to mirror the original size and thread forms where relevant, enabling straightforward replacement without modification.

• Complete set of manifold studs/bolts, nuts and washers as specified for compatible vehicles
• Materials selected for elevated temperature exposure and corrosion resistance
• Thread and length matched to original equipment to preserve torque and sealing

How difficult is installation and what tools will I need?

Replacing exhaust manifold hardware is a common DIY task for competent home mechanics, but it can be tight and rusty—plan for access, penetrating oil and patience. The kit itself is a direct hardware swap, so no special adapters are required if your vehicle matches the fitment listing.

• Basic hand tools: ratchet, sockets, wrenches and torque wrench for proper tightening
• Penetrating lubricant and heat if removing seized components
• Safety gear: gloves and eye protection; anti-seize on threads if recommended for your application

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

Dorman supplies this kit to match the factory configuration used on specific makes and models. To ensure correct fit, compare your vehicle’s OEM part numbers or use the seller’s vehicle lookup tool by entering make, model and trim level before purchase.

• Use online garage or compatibility lookup to validate fitment
• Reference existing fastener sizes and thread types if available
• Contact parts support with vehicle VIN for exact confirmation when unsure

What benefits does replacing exhaust manifold hardware deliver?

Fresh hardware restores clamping force, reduces exhaust leaks and eliminates the corrosion and wear that cause noisy joints or gasket failures. Installing a matched replacement kit simplifies repairs by replacing all worn pieces at once rather than reusing compromised bolts.

• Re-establishes proper manifold-to-head clamping for better sealing
• Reduces risk of future leaks or broken studs under thermal cycling
• Streamlines repair time with a complete matched set of fasteners

Who is this for? The Dorman 03407B Exhaust Manifold Hardware Kit is aimed at professional mechanics and experienced DIYers who need a reliable, direct-replacement set of manifold fasteners for vehicles specified in Dorman’s fitment list. It’s particularly useful when original studs, bolts or nuts are corroded, stripped or broken and you want an OEM-matching solution without custom fabrication. If you’re unsure about fitment, use the vehicle lookup tool or provide your VIN to ensure the kit matches your application before ordering.