KIT EX VALVE+SPRING KX450F, PROX 28.SES4406-1 EXHAUST
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with 
Prox Steel Exhaust Valve and Spring Kit. This kit contains a set of steel exhaust valves and special designed stronger valve springs. The ProX steel valves offer 3 times the lifespan of OEM titanium valves. The kit replaces OEM valves and valve springs and can be installed using OEM retainers, bases, and valve seats. Part number PROX 28.SES4406-1. Manufacturer: Pro-X Racing. Weight: 172 grams.
- SKU
- 65-K111.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (2)
Fitments (17)
| Make | Model | Year |
|---|---|---|
| KAWASAKI | KFX 450 | 2008 |
| KAWASAKI | KFX 450 | 2009 |
| KAWASAKI | KFX 450 | 2010 |
| KAWASAKI | KFX 450 | 2011 |
| KAWASAKI | KFX 450 | 2012 |
| KAWASAKI | KFX 450 | 2013 |
| KAWASAKI | KFX 450 | 2014 |
| KAWASAKI | KFX R 450 | 2008 |
| KAWASAKI | KFX R 450 | 2009 |
| KAWASAKI | KFX R 450 | 2010 |
| KAWASAKI | KFX R 450 | 2011 |
| KAWASAKI | KFX R 450 | 2012 |
| KAWASAKI | KFX R 450 | 2013 |
| KAWASAKI | KFX R 450 | 2014 |
| KAWASAKI | KX 450F | 2006 |
| KAWASAKI | KX 450F | 2007 |
| KAWASAKI | KX 450F | 2008 |
- General Product Group
- Cam & Valvetrain
- General Product Type
- Valve & Spring Kit
- Variant Id
- 264458
FULL DESCRIPTION
ProX Steel Exhaust Valve and Spring Kit
Upgrade your motorcycle's exhaust system with this high-quality Steel Exhaust Valve and Spring Kit from ProX. Engineered for durability and performance, this kit offers a significant increase in lifespan compared to OEM titanium valves. ProX steel valves are designed to last up to 3 times longer than standard titanium valves.
This comprehensive kit includes a set of specially designed stronger valve springs. Because steel valves are heavier than titanium, these enhanced springs are crucial for optimal function and performance. The ProX kit seamlessly replaces your original exhaust valves and springs. You can utilize your existing OEM retainers, bases, and valve seats for a straightforward installation.
Key Features:
- Extended Lifespan: Steel valves provide up to 3 times the lifespan of OEM titanium valves.
- Enhanced Durability: Robust steel construction for long-lasting performance.
- Complete Kit: Includes steel exhaust valves and stronger, specifically designed valve springs.
- OEM Compatibility: Designed to replace stock valves and springs, utilizing OEM retainers, bases, and valve seats.
- Optimized Performance: Stronger springs compensate for the increased weight of steel valves, ensuring proper operation.
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.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.