AUTOVIC Exhaust Manifold Studs M8x1.25x40 9-Piece Stainless for Honda/Acura B‑D Series, Corrosion‑Resistant

This kit supplies nine M8x1.25x40 studs and nine machined nuts made from 304 stainless steel, designed to restore secure exhaust manifold mounting on B18, B20, D15, D16 and related B-/D-series motors. The studs are sold as a direct-replacement set for stock hardware, offering corrosion resistance and consistent thread engagement during manifold removal and reinstallation.

How will these studs improve manifold maintenance?

Replacing corroded or rounded exhaust studs with fresh stainless hardware reduces the risk of shearing and eases future manifold removal. These studs allow precise clamping force with machined nuts so gaskets seat properly and exhaust leaks are minimized.

• Direct-fit M8x1.25 thread pitch matches OEM specifications.
• Stainless composition resists rust in high-heat, corrosive exhaust environments.
• Nuts are machined for consistent torque application and reuse.
• Available as a full nine-stud set to cover common manifold patterns.

What makes the material and dimensions suitable for Honda and Acura engines?

The studs are manufactured from 304 stainless steel, a common choice for automotive fasteners exposed to heat and road contaminants. The 40 mm length with M8 diameter and 1.25 mm pitch ensures proper engagement through manifold flanges and into the cylinder head on B- and D-series platforms.

• 304 stainless steel for oxidation and corrosion resistance.
• M8 x 1.25 thread matches OEM fastener standards for these engines.
• 40 mm stud length accommodates typical flange thicknesses and gasket stack.
• Nine studs and nine nuts supplied to replace the entire mounting set.

How easy is installation and what tools will I need?

Installation is straightforward for anyone familiar with basic engine work: remove old studs or bolts, clean threads, and install the new studs with appropriate torque. Because the kit uses standard metric sizes, common hand tools and thread-locking or anti-seize compound (if preferred) are sufficient.

• Direct-fit design for plug-and-play replacement—no modifications required.
• Standard metric sockets and torque wrench recommended for proper tightening.
• Use anti-seize or thread locker per service preference and heat considerations.
• Inspect head threads before installation; consider thread chaser if needed.

Will this kit replace all the fasteners on my manifold?

The package includes nine studs and nine nuts—sized to meet common exhaust manifold configurations used on many B- and D-series Honda and Acura engines. Verify your engine’s bolt pattern and part count before purchase to ensure this set fits your specific application.

• Contains exactly 9 studs (M8x1.25x40) and 9 matching nuts.
• Intended for B18, B20, D15, D16 and similar B-/D-series manifolds.
• Check existing hardware quantity and thread size before ordering.
• Aftermarket support available via email for fitment questions or concerns.

Who this kit is for: mechanics, DIY enthusiasts, and restoration specialists working on Honda and Acura B- and D-series engines who need a reliable replacement for degraded exhaust manifold fasteners. Choose this AUTOVIC set when you want corrosion-resistant studs and machined nuts that match OEM thread standard and simplify future manifold service without altering the engine or flange hardware.