Kibblewhite Cylinder Head Bolt Stud Nut TRX 450R 450ER 450 ER CRF 450X R RX BPR
🔥 TRX450R 450ER CRF450X KPMI Oversize Head Stud Kit 12mm MAX CLAMP 🔥
🛠️ Extreme Duty Upgrade: Maximize Clamping Force for High-Performance Builds!
When pushing your Honda TRX450R, TRX450ER, or CRF450 to the limit, reliability starts at the cylinder head. This Kibblewhite KPMI Oversize Head Stud Kit is the ultimate solution for maximum performance applications where the OEM studs are simply inadequate. These Black Diamond™ studs feature a consistent 12mm body diameter—upgraded from the stock thin section—providing maximum clamping force and unparalleled proof-stress reliability for extreme duty and peace of mind on the track.
✅ Uncompromising Strength: Aircraft Alloy Steel, Rolled Threads, Made in USA!
Invest in the highest quality fasteners available. KPMI® Cylinder Studs are made from 180,000 psi yield strength, fine grain, heat treated, aircraft grade alloy steel. The threads are **"rolled" to create the toughest and strongest thread possible**, and the entire body is center-less ground to remove notch sensitivity. The nuts are single point machined from high tensile strength Aircraft Alloy Steel and heat treated to ensure hard, wear-resistant surfaces while retaining a ductile core to prevent cracking. Both nuts and studs receive a premium Black Oxide treatment for enhanced corrosion resistance, guaranteeing a stud that meets and exceeds high-performance needs!
- Studs are heat treated 180,000 psi aircraft alloy steel.
- 12mm Oversize Diameters throughout the stud body for maximum clamping force.
- Nuts and studs have rolled threads for the strongest possible threads.
- Treated with black oxide for enhanced corrosion resistance.
- Quantity includes 4pcs. Studs / 4pcs. Nuts / 4pcs. Washers.
📦 IMPORTANT: Installation Requirements & Fitment Details!
This 12mm Oversize Stud Kit is designed for extreme duty and high performance, requiring a **simple drilling operation with a 1/2” drill bit** to modify the cylinder head for fitment. This modification is necessary to achieve maximum clamping force (the 12mm thread for the case end reduces to a 10mm thread for the nut on standard studs, but the oversize option keeps a consistent 12mm diameter). This kit is precision engineered for a flawless fit on the following models.
- Fits Honda® CRF™ 450R (2002-2008) & CRF™ 450X (2005-2017).
- Fits Honda® TRX™ 450R/ER (2006-2014).
- Cylinder Head Modification Required (simple 1/2" drill bit operation).
- Replaces Honda OEM Part #s: 90031-MEB-670, 90453-KCY-670, 94050-10000.
- Studs are proudly MADE IN USA.
❓ Frequently Asked Questions (FAQ)
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Q: Why do I need to modify the cylinder head?
A: The KPMI Black Diamond studs use a consistent 12mm diameter to achieve maximum clamping force, which requires slightly enlarging the stock cylinder head bolt holes with a 1/2" drill bit.
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Q: What is the benefit of rolled threads?
A: Rolling the threads, rather than cutting them, creates a much stronger, tougher, and more fatigue-resistant thread, which is essential for high-stress applications.
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Q: Are these compatible with my stock cylinder?
A: Yes, these studs are designed to fit your stock cylinder case, though they require the specified modification to the cylinder head itself.
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Q: What is the material of the stud?
A: The studs are made from 180,000 psi yield strength, fine grain, heat treated, aircraft grade alloy steel.
🌟 Why Buy from BPRATV? Your Authority for Honda Performance! 🌟
At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. This complete KPMI Head Stud Kit is curated to deliver reliability, power, and value in one box—so you can spend less time wrenching and more time riding. Trust BPRATV to deliver the parts you need to keep your Honda TRX450R running at its best, every single time.
Upgrade to KPMI Black Diamond studs and maximize your engine's potential! 🏁
BPRATV - The Best Parts. The Best Performance. The Best Price.
BRAPPPPPPPPPP!
© BPRATV LLC 1-year limited warranty from the manufacturer for material or workmanship defects.* Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express warranty or any implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not, under any circumstances, be liable for any specific, incidental or consequential damages, including, but not limited to, damage, or loss of property or equipment, loss of profits or revenue(s), cost of purchased or replacement goods, or claims of customers of the purpose, which may arise and/or shall result from sale, installation or use of these parts. Installation of these parts may void vehicle manufacturers warranty coverage and/or may cause the vehicle to be illegal in some locations. This product is exempt from the emission standards and related requirements of 40 C.F.R. § 1051 as provided by 40 C.F.R. § 1051.620, and California law [e.g., vehicle code§§ 27156 and 38391]. This product is sold only for use in connection with EPA -certified, purpose-built, non-road vehicles used solely for closed course, non-road competition/racing and not used for any recreational purpose or on public highways or right of ways maintained by and open to the public. This product is sold only in connection with machines that do not fall under state and/or federal noise or emission standards/regulations. Purchasers who/that purchase this product represent and warrant that the product is purchased only in connection with EPA -certified, emission-regulations-exempt and noise-regulations-exempt competition/racing vehicles as interpreted under applicable state and/or federal law.
