KIT IN VALVE+SPRING CRF450, PROX 28.SIS1403-2 INTAKE
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 INTAKE Valve/Spring Kit. This kit contains steel intake valves and specially designed stronger valve springs. The ProX kit replaces OEM valves and valve springs and can be installed using OEM retainers, bases, and valve seats. Part number: 28.SIS1403-2. Weight: 174g. Manufacturer: Pro-X Racing.
- SKU
- 65-K153.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (5)
Fitments (7)
| Make | Model | Year |
|---|---|---|
| HONDA | CRF 450R | 2002 |
| HONDA | CRF 450R | 2003 |
| HONDA | CRF 450R | 2004 |
| HONDA | CRF 450R | 2005 |
| HONDA | CRF 450R | 2006 |
| HONDA | CRF 450R | 2007 |
| HONDA | CRF 450R | 2008 |
- General Product Group
- Cam & Valvetrain
- General Product Type
- Valve & Spring Kit
- Variant Id
- 264469
FULL DESCRIPTION
ProX Steel Intake Valve and Spring Kit for Honda CRF450R
Upgrade your engine's performance and durability with the ProX Steel Intake Valve and Spring Kit. This kit is designed to replace your original equipment titanium valves with robust steel alternatives, significantly extending the lifespan of your engine's valve train.
ProX specializes in high-quality engine components, and this kit exemplifies their commitment to durability and performance. By converting from titanium to steel, you can expect up to three times the lifespan compared to OEM titanium valves, providing a more reliable and long-lasting solution for your motorcycle.
Key Features:
- Steel Intake Valves: Manufactured from high-strength steel for enhanced durability and longevity.
- Stronger Valve Springs: Includes specially designed, stronger valve springs to accommodate the increased weight of steel valves, ensuring proper valve operation.
- Direct Replacement: Designed to directly replace OEM valves and valve springs.
- Uses OEM Components: Can be installed using your motorcycle's original retainers, bases, and valve seats, simplifying the installation process.
- Extended Lifespan: Offers up to three times the lifespan of OEM titanium valves, reducing the need for frequent replacements.
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.


