2Bros Parts

KIT IN VALVE+SPRING CRF450X, PROX 28.SIS1405-2 INTAKE

$154.81Only 1 left

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Delivery to United States 5–8 business days

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ProX Steel Intake Valve and Spring Kit for Honda CRF450X (2005-2017). This kit includes steel intake valves and specially designed stronger valve springs. The ProX steel valves offer up to three times the lifespan of OEM titanium valves. The kit replaces OEM valves and springs and can be installed using OEM retainers, bases, and valve seats. Part number 28.SIS1405-2. Weight: 172g.

Specifications
SKU
65-K154.PX
Brand
Pro-X Racing
Availability
In Stock (1)

Fitments (13)

MakeModelYear
HONDACRF 450X2005
HONDACRF 450X2006
HONDACRF 450X2007
HONDACRF 450X2008
HONDACRF 450X2009
HONDACRF 450X2010
HONDACRF 450X2011
HONDACRF 450X2012
HONDACRF 450X2013
HONDACRF 450X2014
HONDACRF 450X2015
HONDACRF 450X2016
HONDACRF 450X2017
General Product Group
Cam & Valvetrain
General Product Type
Valve & Spring Kit
Variant Id
264470
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

ProX Steel Intake Valve and Spring Kit

Upgrade your engine's performance and durability with the ProX Steel Intake Valve and Spring Kit. This kit is designed as a high-quality replacement for your original equipment, offering a significant improvement in lifespan compared to standard titanium valves.

ProX is known for its innovative conversion kits, and this steel intake valve set exemplifies their commitment to quality and longevity. The kit includes a robust steel intake valve and specially designed, stronger valve springs. The heavier steel valve requires a stronger spring to ensure optimal performance and prevent valve float.

Installation is straightforward as this kit is engineered to directly replace OEM valves and springs. You can use your original retainers, bases, and valve seats, making the upgrade process seamless.

Key Features:

  • Extends lifespan up to three times longer than OEM titanium valves.
  • Includes a high-quality steel intake valve.
  • Comes with specially designed, stronger valve springs to match the heavier valve.
  • Direct replacement for OEM valves and springs.
  • Utilizes existing OEM retainers, bases, and valve seats.
  • Constructed with durable materials for enhanced reliability.
Before you buy

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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