KIT EX VALVE+SPRING YZF450, PROX 28.SES2444-1
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Delivery to United States 5–8 business days
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Prox Steel Exhaust Valve and Spring Kit. This kit includes a set of steel exhaust valves and specially designed stronger valve springs. The ProX steel valves offer extended lifespan compared to OEM titanium valves. The kit replaces OEM valves and valve springs and can be installed using OEM retainers, bases, and valve seats. Manufacturer: Pro-X Racing.
- SKU
- 65-K104.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (2)
Fitments (2)
| Make | Model | Year |
|---|---|---|
| YAMAHA | YZ 450F | 2014 |
| YAMAHA | YZ 450F | 2015 |
- General Product Group
- Cam & Valvetrain
- General Product Type
- Valve & Spring Kit
- Variant Id
- 264451
FULL DESCRIPTION
ProX Steel Exhaust Valve and Spring Kit
Upgrade your motorcycle's performance and durability with the ProX Steel Exhaust Valve and Spring Kit. This kit is engineered to provide a significantly longer lifespan compared to standard OEM titanium valves, offering up to three times the durability.
Each kit includes high-quality steel exhaust valves and specially designed, stronger valve springs. The increased weight of the steel valves necessitates the use of these enhanced springs to ensure optimal performance and reliability.
Designed for direct replacement, this ProX kit seamlessly integrates with your motorcycle's existing components. You can utilize your original OEM retainers, bases, and valve seats for an easy installation process.
Key Features:
- Durable Steel Construction: Offers extended lifespan over OEM titanium valves.
- Increased Durability: Designed to last up to three times longer than stock.
- Includes Stronger Valve Springs: Compensates for the valve's increased weight, ensuring proper function.
- Direct Replacement: Engineered to fit using OEM retainers, bases, and valve seats.
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.
More answers in our FAQ.
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