KPMI INTAKE VALVE SPRING KIT 30-31230-atv motorcycle utv parts accessories gear helmets jackets gloves pantsAll Terrain Depot
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    Free basic installs for select purchases

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    Free shipping for orders over $99.99 (restrictions apply). Flat $8.99 Shipping for under $99.99



KPMI`s Intake Only Kits have been designed as a stainless steel valve conversion system to replace factory titanium intake valves and components. KPMI’s engineers use our proprietary design and simulation softwares to create these systems. Our design, simulation, and manufacturing processes insure compatibility of the valve spring’s force and natural frequency with the cam profile, the mass of the system, and the engine RPM. Literally thousands of riders have converted to these kits to extend the life of their intake valves.


Make Model Year
Husqvarna FX 450 2017
Husqvarna FC 450 2014
Husqvarna FC 450 2015
Husqvarna FC 450 2016
Husqvarna FC 450 2017
Honda CRF450X 2005
Honda CRF450X 2006
Honda CRF450X 2007
Honda CRF450X 2008
Honda CRF450X 2009
Honda CRF450X 2012
Honda CRF450X 2013
Honda CRF450X 2014
Honda CRF450X 2015
Honda CRF450X 2016
Honda CRF450X 2017
KTM 450 SX-F 2013
KTM 450 SX-F 2014
KTM 450 SX-F 2015
KTM 450 SX-F 2016
KTM 450 SX-F 2017
KTM 450 XC-F 2013
KTM 450 XC-F 2014
KTM 450 XC-F 2015
KTM 450 XC-F 2016
KTM 450 XC-F 2017
Husqvarna FS450 2017
KTM 450 SX-F 2018
Husqvarna FC 450 2018
Husqvarna FS450 2018
Husqvarna FC 450 Rockstar Edition 2018
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All Items Ship From The USA

Shipping and Delivery

Some products we sell are shipped directly from distributor warehouses around the country.

Although certain items are kept in stock, some products are custom made to order and require manufacturing time.

Expected ship dates are our best estimate based on past shipping times and are more than 90% accurate. Should an unexpected delay in shipping occur, we will notify you by e-mail (or letter) of the new projected shipping date, and provide you with an opportunity to keep your order, or cancel it for a prompt and complete refund.

In-stock items usually ship the same business day (weekends and holidays are not considered business days).

Please allow an additional 1 to 5 business days after the shipment date for delivery.

Free Shipping

Get Free Shipping on qualified items without hidden fees. 

All Terrain Depot has Free Shipping everyday for most product purchases over $99, saving you some valuable cash on your ATV/UTV Accessory products. Some restrictions do apply.

Here's the details:

  • Free shipping offer is valid only on qualified items. Eligible items are identified on their product information page. They can also be identified in your shopping cart. 
  • Shipping method will be selected by All Terrain Depot. Free shipping orders will be delivered via a standard ground shipping method selected by our direct-ship manufacturers/fulfillment centers.  
  • Not available on international, Alaska, Hawaii, Puerto Rico or APO/FPO orders. Only standard ground shipping orders to residential and commercial addresses in the continental US are eligible for Free Shipping.

Lost or damaged shipments

Items will not be replaced or refunded until carriers perform their investigation. This period ranges from a few days to a few weeks.

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