KIT EX VALVE+SPRING KX250F, PROX 28.SES4335-1 EXHAUST
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 18+, T&Cs apply
Prox Steel Exhaust Valve/Spring Kit. This kit contains a set of steel exhaust valves plus a set of special designed stronger valve springs. The ProX kit replaces OEM valves and valve springs and can be installed using OEM retainers, bases, and valve seats. PROX 28.SES4335-1.
- SKU
- 65-K110.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (1)
Fitments (16)
| Make | Model | Year |
|---|---|---|
| KAWASAKI | KX 250F | 2004 |
| KAWASAKI | KX 250F | 2005 |
| KAWASAKI | KX 250F | 2006 |
| KAWASAKI | KX 250F | 2007 |
| KAWASAKI | KX 250F | 2008 |
| KAWASAKI | KX 250F | 2009 |
| KAWASAKI | KX 250F | 2010 |
| KAWASAKI | KX 250F | 2011 |
| KAWASAKI | KX 250F | 2012 |
| KAWASAKI | KX 250F | 2013 |
| KAWASAKI | KX 250F | 2014 |
| KAWASAKI | KX 250F | 2015 |
| KAWASAKI | KX 250F | 2016 |
| SUZUKI | RM-Z 250 | 2004 |
| SUZUKI | RM-Z 250 | 2005 |
| SUZUKI | RM-Z 250 | 2006 |
- General Product Group
- Cam & Valvetrain
- General Product Type
- Valve & Spring Kit
- Variant Id
- 264457
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 high-quality kit is designed to replace OEM titanium valves with stronger, more resilient steel components.
ProX offers a comprehensive range of titanium-to-steel conversion kits. The ProX steel valves significantly extend lifespan compared to OEM titanium valves, offering up to three times the durability.
Key Features:
- Includes a set of steel exhaust valves.
- Comes with specially designed, stronger valve springs to compensate for the increased weight of steel valves.
- Direct replacement for OEM valves and valve springs.
- Utilizes OEM retainers, bases, and valve seats for easy installation.
- Constructed from durable steel for enhanced longevity.
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
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.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. 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.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.


