🛠️ Kibblewhite Heavy Duty Cylinder Head Stud Kit – YFZ450R / YFZ450X (2009–2024)

Upgrade your YFZ450R’s top-end reliability with this heavy-duty stud kit from Kibblewhite Precision Machining. Designed for high-compression builds and aggressive riding, these American-made studs provide superior clamping force and fatigue resistance over OEM bolts.

✅ What’s Included:

• (4) Kibblewhite 180,000 PSI Aircraft-Grade Alloy Cylinder Studs

• (4) High-Tensile Billet Nuts

• (4) Black Oxide Washers

🧰 Specifications:

• Part #: 80-82800

• Equivalent OEM #: 90105-10163-00 / 90201-10025-00

• Black oxide treated for corrosion resistance

• Rolled threads for maximum strength

• Studs centerless-ground to remove notch sensitivity

• Heat treated and stress-proofed

🧠 Why Upgrade?

• Prevents head gasket failure in high-compression or big bore builds

• Eliminates OEM bolt stretch and torque loss

• Trusted in high-performance ATV engines worldwide

📦 Fitment:

• Yamaha YFZ450R / YFZ450X: 2009–2024 (all models & editions)

• Also fits:
  • Yamaha WR450F (2007–2015)
  • Yamaha YZ450F (2006–2009)

🛡️ Warranty Info:

• Backed by KPMI's high-performance engineering guarantee

• Covers manufacturing defects (does not include failure due to improper installation or tuning)