Kibblewhite YFZ450R Intake Valve & Spring Kit – Stainless Conversion
Kibblewhite Intake Stainless Valve & Spring Kit – Yamaha YFZ450 / YFZ450R/X / WR450F / YZ450F (2003–2009)
Upgrade your Yamaha’s valvetrain with this Kibblewhite stainless steel conversion kit, engineered for exceptional durability and performance. Designed to replace OEM titanium valves with long-life stainless components for up to 4× more runtime and reliability.
✅ What’s Included
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(2) Outer stainless intake valves – 3.040" length
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(1) Center stainless intake valve – 3.000" length
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(3) Titanium retainers
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(3) Valve springs
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(3) Base washers
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(3) Red Viton® valve stem seals
⚙️ Key Features & Benefits
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4× Longer Lifespan: Stainless Black Diamond valves outlast OEM titanium
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Complete Conversion Kit: Everything needed to convert your head
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CNC-Precision Components: Titanium retainers + heat-treated springs
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Engineered for Reliability: Tested with FEA and proprietary cam/spring analysis
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Made in the USA: Race-proven design and manufacturing quality
📦 Compatibility
Fits the following Yamaha models:
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YFZ450 (2004–2009)
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YFZ450R (2009–2025)
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YFZ450X (2010–2011)
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WR450F (2003–2016)
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YZ450F (2003–2009)
🛡️ Warranty Info
Manufacturer-backed warranty included.
Professional installation recommended for best results.
💲 Price: $303.29 (Suggested Retail)
🔢 SKU: 0926-2739
🏷️ Brand: Kibblewhite
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
