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When replacing or upgrading your vehicle's exhaust system, the right fasteners are crucial for a secure and leak-free seal. Exhaust studs and nuts are small but vital components that experience extreme heat and vibration. Selecting high-quality, durable parts ensures longevity and prevents common exhaust leaks that can affect performance and emissions.
Upgraded hardware - this set of six M10-1.5 exhaust manifold mounting studs and nuts are 100 percent stainless steel for superior heat and corrosion resistance
Convenient solution - kit contains all the application-specific hardware necessary to join one exhaust manifold to one manifold flange
Matches fit - this hardware matches the fit and function of the factory fasteners, while offering superior durability
Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
Compatible Models: Our automotive stud nut kits are compatible with Lincoln, Ford, and Mercury brands. To keep your purchased kit fit, please carefully check the specific model information in the picture or detail description before purchasing
Replacement OEM Number: The OEM replacement numbers for our automotive stud nut kits are W707747S431, N811313S431 and W701706-S2. Please double check your vehicle OEM number and the applicable model to avoid unavailability after purchase
Fixed Manifold: The stud nut kit is used to secure the manifold to the engine head, keeping it from loosening during engine operation. Typically, this kit is used in conjunction with a gasket to keep the connection sealed
High Temperature Resistant: Our stud nut kits are made of stainless steel, high temperature resistant, which can maintain its structural stability under the high temperature environment of the car system and reduce the frequency of your replacement parts
Stud Sizes: The thread size of our studs is M8*1.25*50mm, a total of 16 studs and 16 nuts in one set can be used on both manifolds. It is recommended that you use a socket wrench when installing the studs so that each stud can be tightened
【Function】The Exhaust Manifold Bolt Set is Made of High-Quality Materials,Which is Sturdy,Durable,and Has a Long Service Life. This Kit Includes 8 × Hex Flange Lock Nut (6505316AA),4 × Stud (6505257AA),4 × Stud (6504331),8 × Hex Screw (6504340).
【Replaces#】6505257AA, 6504331, 6504340, 6508219AA, 6508220AA, 6507746AA, 6505316AA.Please Check the OEM Part Number and Make Sure Your Part Number Matches this Part Number Before Buying!
【Compatible】Fit for Dodge Vehicles:2000-2007 Dakota; 2000-2009 Durango; 2002-2008 Ram 1500.Fit for Jeep Vehicles:2006-2009 Commander; 1999-2009 Grand Cherokee.Fit for 2007-2009 Chrysler Aspen.Fit for 2006-2007 Mitsubishi Raider.
【Premium Quality】Tested & Certified to Meet or Exceed OEM Quality Standards.All Products are 100% Tested Before Leaving the Factory.Made of High Quality Material.
【Warranty】The Exhaust Manifold Bolt Set come with 12 Month Warranty. Hassle-free Return and Refund Policy. Please Buy it with Your Confidence.
Last update on 2026-09-02 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Exhaust Studs & Nuts
Understanding Exhaust Fastener Materials
Stainless Steel: Offers excellent corrosion resistance and can withstand high temperatures. It's a popular choice for its durability and longevity, especially in humid or coastal environments.
Steel Alloys: Often treated or coated for enhanced strength and heat resistance. These can be a more budget-friendly option while still providing good performance for most applications.
Titanium: The premium choice, offering superior strength-to-weight ratio and exceptional heat resistance. While more expensive, it's ideal for high-performance or racing applications where weight and extreme conditions are factors.
Key Features to Consider
Thread Pitch and Size: Ensure the studs and nuts match the existing manifold and pipe threads precisely. Incorrect sizing will prevent proper installation and sealing.
Corrosion Resistance: Look for coatings or materials that resist rust and corrosion, especially if your vehicle is exposed to road salt or moisture.
Heat Tolerance: Exhaust components operate under extreme heat. Choose fasteners rated for the temperatures your exhaust system will reach to prevent failure.
Strength and Durability: Select fasteners made from robust materials that can withstand the constant vibration and stress of an automotive exhaust system.
Installation Tips
Always clean the mating surfaces of the exhaust manifold and pipe thoroughly before installation.
Use anti-seize compound on the threads of the studs and nuts to prevent seizing due to heat and corrosion.
Tighten nuts gradually and evenly in a star pattern to ensure a uniform seal and prevent warping of the manifold or pipe.
Torque specifications, if available, should be followed to prevent over-tightening or under-tightening.
Frequently Asked Questions
What is the difference between exhaust studs and bolts?
Exhaust studs are threaded rods that screw into the manifold or head, with nuts then tightened onto the exposed threads. Bolts have a head and are threaded all the way down, being tightened directly against the surface.
Why do exhaust studs and nuts fail?
Failure is often due to extreme heat cycles causing material fatigue, corrosion from moisture and road salt, and constant vibration leading to loosening or breakage.
Do I need special nuts for exhaust studs?
Yes, exhaust nuts are typically designed to withstand higher temperatures and vibrations than standard hardware. Flange nuts or locking nuts are often recommended for a secure fit.
How often should exhaust studs and nuts be replaced?
Replacement is usually necessary when performing other exhaust work, if leaks are detected, or if the existing fasteners show signs of rust, damage, or stretching.
Can I reuse old exhaust studs and nuts?
It's generally not recommended to reuse old fasteners. Heat cycles can weaken them, and corrosion can make them difficult to remove or reuse effectively, potentially leading to leaks.
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