Exoracing Extended Intake Exhaust Stud Kit For Honda B/D/K/H/F-Series
- SKU:
- EX-SS-IEM
Full product information
Everything needed to choose and fit it
Product description and what’s included
<div class="pdp-buying-guide"> <h2>Choose The Right Extended Intake Or Exhaust Stud Kit For Your Honda Engine</h2> <p>The Exoracing extended intake and exhaust stud kit is designed to replace tired, rusty or rounded Honda manifold hardware with stronger 304 stainless steel M8 studs, stainless nuts and thermo nylon washers.</p> <p>The extended 50mm length is useful when fitting thicker intake thermal gaskets, aftermarket manifolds, turbo manifolds or larger exhaust manifold flanges where the original hardware may not give enough thread engagement.</p> <ul> <li><strong>Thread and size:</strong> M8x1.25x50 extended studs</li> <li><strong>Material:</strong> 304 stainless steel studs and nuts with thermo nylon washers</li> <li><strong>Included:</strong> 10 extended M8 studs, 10 stainless M8 nuts, 10 thermo nylon washers and Exoracing lifetime warranty</li> <li><strong>Honda fitment:</strong> B-Series, C-Series, D-Series, F-Series and H-Series intake or exhaust; K-Series intake only</li> <li><strong>Best fitted when:</strong> the intake manifold, exhaust manifold or turbo manifold is already removed</li> </ul> <p><strong>Important:</strong> Please confirm your engine uses M8x1.25 manifold hardware before ordering. These are extended studs, so check clearance around the manifold, flange, washer and nut before final installation.</p> </div> <h2>Why Use Exoracing Extended Intake Exhaust Studs?</h2> <p>Old Honda manifold hardware has usually had a hard life. On B, D, H, F and K-Series engines, the original studs and bolts may have been heat-cycled, removed, refitted, rounded or left to corrode for decades. Reusing weak hardware can make manifold jobs more frustrating and increase the risk of snapped studs, loose nuts, leaks or poor clamping force.</p> <p>These Exoracing extended studs solve two common problems at once. First, they replace old manifold hardware with 304 stainless steel studs and nuts. Second, the 50mm extended length gives more thread engagement when you are using thicker gaskets, thermal intake gaskets or aftermarket manifolds with larger flanges.</p> <p>The hex tip makes installation easier than the old two-nut method because you can wind the stud into the cylinder head with an Allen key or hex socket. That makes them a sensible upgrade during an intake manifold swap, exhaust manifold change, turbo manifold install or engine bay refresh.</p> <p>If you are building a matching Honda bay, these also sit naturally with the <a href="https://exoracing.co.uk/exoracing-titanium-intake-exhaust-manifold-nut-and-stud-kit/">Exoracing titanium intake exhaust manifold nut and stud kit</a>, <a href="https://exoracing.co.uk/exoracing-dress-up-bolt-and-washer-kit-m6x1-0/">Exoracing dress-up bolt and washer kit</a> and <a href="https://exoracing.co.uk/exoracing-engraved-flush-spark-plug-cover-for-honda-ep3-dc5-k20-k24/">Exoracing K-Series flush spark plug cover</a>.</p> <h2>Honda Engine Fitment Guide</h2> <p>This kit is aimed at Honda engines that use M8x1.25 manifold hardware. Always check your original hardware before ordering, especially if the engine has been swapped, modified or fitted with aftermarket manifolds.</p> <table style="border-collapse: collapse; width: 100%; border: 1px solid #d8c4e8;"> <tbody> <tr style="background-color: #4b1f73; color: #ffffff;"> <td style="width: 50%; padding: 8px; border: 1px solid #d8c4e8;"><strong>Honda Engine</strong></td> <td style="width: 50%; padding: 8px; border: 1px solid #d8c4e8;"><strong>Fitment</strong></td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Honda B-Series</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Intake or exhaust manifold</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Honda C-Series</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Intake or exhaust manifold</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Honda D-Series</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Intake or exhaust manifold</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Honda F-Series</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Intake or exhaust manifold</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Honda H-Series</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Intake or exhaust manifold</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Honda K-Series</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Intake manifold only</td> </tr> </tbody> </table> <h2>When Should You Fit Extended Studs?</h2> <table style="border-collapse: collapse; width: 100%; border: 1px solid #d8c4e8;"> <tbody> <tr style="background-color: #4b1f73; color: #ffffff;"> <td style="width: 40%; padding: 8px; border: 1px solid #d8c4e8;"><strong>Job</strong></td> <td style="width: 60%; padding: 8px; border: 1px solid #d8c4e8;"><strong>Why It Makes Sense</strong></td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Thermal intake gasket install</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">The extra stud length helps when the gasket is thicker than OEM.</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Aftermarket exhaust or turbo manifold</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Useful when the manifold flange is larger, or the original hardware is too short.</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Engine rebuild or bay refresh</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Replaces rusty hardware while access is easy.</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;">Repeated manifold removal</td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Studs make future manifold removal and refitting cleaner than using bolts.</td> </tr> </tbody> </table> <h2>Purchase Includes:</h2> <ul> <li>10 x Exoracing extended M8 intake exhaust studs</li> <li>10 x Exoracing 304 stainless steel M8 nuts</li> <li>10 x Exoracing thermo nylon washers</li> <li>1 x Exoracing lifetime warranty</li> </ul> <h2>Features:</h2> <ul> <li>M8x1.25x50 extended stud size for common Honda manifold applications</li> <li>304 stainless steel studs and nuts for corrosion resistance</li> <li>Extended length helps with thermal gaskets and thicker aftermarket manifold flanges</li> <li>The hex tip head makes installation easier than the two-nut method</li> <li>Includes thermo nylon washers</li> <li>Suitable for Honda B, C, D, F and H-Series intake or exhaust applications</li> <li>Suitable for Honda K-Series intake manifold applications</li> <li>Full kit weight: 218g</li> <li>Includes Exoracing lifetime warranty</li> </ul> <h2>Exoracing Extended Stud Kit Installation Guide:</h2> <p>These studs are best installed while the intake manifold, exhaust manifold or turbo manifold is already removed or loosened. We also have a full <a href="https://exoracing.co.uk/our-blog?p=how-to-install-titanium-intake-exhaust-studs">intake or exhaust stud installation guide</a> with extra images and video support.</p> <ol> <li>Confirm the original manifold hardware is M8x1.25 and check that the extended 50mm length is suitable for your manifold and gasket setup.</li> <li>Remove the old, rusted studs or bolts from the cylinder head. If the manifold is still in place, leave a few fixings finger-tight until you are ready to swap them.</li> <li>Clean the threads in the cylinder head carefully so the new studs can seat correctly.</li> <li>Install the Exoracing extended studs using an Allen key or hex socket in the hex tip.</li> <li>Fit the manifold or gasket, then add the thermo nylon washers and stainless nuts.</li> <li>Tighten the nuts evenly across the manifold so the flange pulls down squarely.</li> <li>After a few heat cycles, recheck the nuts because manifold hardware can settle as it expands and contracts.</li> </ol> <h2>Technical Specifications:</h2> <table style="border-collapse: collapse; width: 100%; border: 1px solid #d8c4e8;"> <tbody> <tr style="background-color: #4b1f73; color: #ffffff;"> <td style="width: 50%; padding: 8px; border: 1px solid #d8c4e8;"><strong>Specification</strong></td> <td style="width: 50%; padding: 8px; border: 1px solid #d8c4e8;"><strong>Details</strong></td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Stud and Nut Material</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">304 stainless steel</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Washer Material</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Thermo nylon</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Thread, Pitch and Length</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">M8x1.25x50</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Full Kit Weight</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">218g</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Single Stud Weight</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">15g</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Single Nut Weight</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">7g</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Single Washer Weight</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Less than 1g</td> </tr> <tr> <td style="padding: 8px; border: 1px solid #d8c4e8; background-color: #f4eef9;"><strong>Warranty</strong></td> <td style="padding: 8px; border: 1px solid #d8c4e8;">Exoracing lifetime warranty</td> </tr> </tbody> </table> <h2>Frequently Asked Questions</h2> <h3>Will these fit my Honda engine?</h3> <p>They are designed for Honda engines using M8x1.25 manifold hardware. They fit B-Series, C-Series, D-Series, F-Series and H-Series intake or exhaust applications, and K-Series intake manifold applications.</p> <h3>Can I use these on a K-Series exhaust manifold?</h3> <p>No. The current fitment guidance is K-Series intake only. Do not order these for a K-Series exhaust manifold unless you have checked your specific setup and confirmed the thread, length and clearance.</p> <h3>Why are these extended?</h3> <p>The 50mm extended length helps when using thicker intake thermal gaskets, aftermarket manifolds or larger manifold flanges where standard hardware may not give enough thread engagement.</p> <h3>Do they include nuts and washers?</h3> <p>Yes. The kit includes 10 extended M8 studs, 10 304 stainless M8 nuts and 10 thermo nylon washers.</p> <h3>Do I need to retighten them after installation?</h3> <p>Yes. Recheck the nuts after a few heat cycles because manifold hardware can settle as it heats up and cools down.</p> <h2>Notes:</h2> <ul> <li>Please confirm your original manifold hardware is M8x1.25 before ordering.</li> <li>Check that the 50mm extended stud length has enough clearance for your manifold, gasket and surrounding parts.</li> <li>Recheck the nuts after a few heat cycles.</li> <li>Professional installation is recommended if any original hardware is seized or damaged.</li> </ul> <div class="exo-v2-related-source-grid"> <div class="exo-v2-related-source-card is-current"><img src="https://cdn11.bigcommerce.com/s-2qhgaelfmo/products/239/images/66577/exoracing-honda-stainless-intake-exhaust-studs__98671.1778775274.386.513.JPG?c=2" alt="Exoracing extended Honda intake exhaust stud kit contents" width="386" height="513" /> <span class="exo-v2-related-source-eyebrow">Performance hardware</span> <h3 class="exo-v2-related-source-title">Exoracing Extended Intake Exhaust Stud Kit For Honda B/D/K/H/F-Series</h3> <p class="exo-v2-related-source-text">Replaces rusty Honda manifold hardware.</p> <a href="#exo-v2-buy">Choose this product</a></div> <div class="exo-v2-related-source-card"><img src="https://cdn11.bigcommerce.com/s-2qhgaelfmo/products/913/images/84719/exoracing-titanium-nut-and-stud-kit-1__26067.1778771082.386.513.jpg?c=2" alt="Exoracing titanium intake exhaust manifold nut and stud kit" width="386" height="513" /> <span class="exo-v2-related-source-eyebrow">Performance hardware</span> <h3 class="exo-v2-related-source-title">Exoracing Titanium Intake Exhaust Manifold Nut and Stud Kit</h3> <p class="exo-v2-related-source-text">Titanium M8 studs for Honda manifolds</p> <a href="../../../../exoracing-titanium-intake-exhaust-manifold-nut-and-stud-kit/">View product</a></div> <div class="exo-v2-related-source-card"><img src="https://cdn11.bigcommerce.com/s-2qhgaelfmo/products/236/images/84727/titanium-honda-strut-nuts__08143.1778862346.386.513.jpg?c=2" alt="Exoracing titanium strut top nuts for Honda Civic and Integra" width="386" height="513" /> <span class="exo-v2-related-source-eyebrow">Performance hardware</span> <h3 class="exo-v2-related-source-title">Exoracing Titanium Suspension Strut Top Nuts For Honda Civic Integra</h3> <p class="exo-v2-related-source-text">Grade 5 titanium Honda strut top nuts</p> <a href="../../../../exoracing-titanium-suspension-strut-top-nuts-for-honda-civic-integra/">View product</a></div> <div class="exo-v2-related-source-card is-reflect"><img src="https://cdn11.bigcommerce.com/s-2qhgaelfmo/products/25716/images/86066/Exoracing_weldable_heat_shield_main_image__46083.1784291358.386.513.png?c=2" alt="Exoracing DIY weldable exhaust heat shield kit with embossed stainless sheet, thermal insulation and two logo plates" width="386" height="513" /> <span class="exo-v2-related-source-eyebrow">Heat management</span> <h3 class="exo-v2-related-source-title">Exoracing DIY Weldable Exhaust Heat Shield Kit 1000mm x 600mm</h3> <p class="exo-v2-related-source-text">Build a custom stainless heat shield around hot exhaust components</p> <a href="../../../../exoracing-diy-weldable-exhaust-heat-shield-kit-1000mm-x-600mm/">View product</a></div> </div>
Warranty

Exoracing Ltd offers a lifetime warranty against manufacturing defects on this Exoracing Ltd product for peace of mind and a risk-free buying experience! We have 100% faith in our products and know they are of the highest quality, so where most manufacturers offer a year, we decided to offer a massive lifetime warranty.
Exoracing Ltd lifetime warranty will cover repairing, replacing, or store credit to the same purchase value if the part has since been discontinued, at our discretion, for any Exoracing Ltd product that is found defective.
Exoracing Ltd's lifetime warranty policy will only apply if the product was purchased through ourselves or an officially licenced distributor in our network.
This warranty policy is non-transferable and all claims under this policy must be accompanied by the original receipt of sale.
Customer reviews
Reviews from Exoracing customers
Loading customer reviews…
No reviews have been published for this product yet.
Customer reviews are temporarily unavailable. Read all customer reviews.