Choose a vehicle:

User Tip: If you're unsure of your vehicle type, you may skip the machine type selection box.

» Log in to use your Rider Profile Machines
Pro X Velocity Stack
  • View Larger

    Customer rating on this product:

    Read reviews ( 2 ) | Write a review

    Live Chat Software

    Pro X Velocity Stack

    Our price: $49.99

    MSRP: $57.24 - You save up to $7.25 (13% off)

    View Product Details

    Select type, make, model and year above

    • "Customer service is priority #1 at Rocky Mountain ATV/MC. We value our customers and strive to be the best shopping experience- when you buy from us, you are buying lifetime service."

      -Dan Thomas, CEO and Founder

    • Returns

      We take pride in offering no hassle returns. In the event of a return, please call, email or chat with us to receive a solution to the problem. For apparel that doesn't fit quite right, Click here to see our Fit Guaranteed Program.

    • Warranties

      We will stand behind all products we sell with regards to manufacturing defects in workmanship and material. Most products are limited to the manufacturer's warranty. However, we will do everything in our power to take care of the problem.

    • Have questions?

      Live Chat: Click here (Leave email if after hours)
      Call us: 1 800 336-5437
      7am-7pm Mon-Fri 8am-4pm Sat (Mountain Standard Time)


      The OEM throttle bodies for the latest fuel injected MX bikes are mainly designed for higher RPM horsepower. However, this is not the best set up for all riding conditions and tracks. Therefore we like to introduce the ProX Velocity Stack. The Velocity Stack has the following advantages:
    • Faster and smoother throttle response.
    • Improves power on low RPM.
    • Easy installation without remapping the ECU.
    • Manufactured in light weight aluminum with high quality finish.

    Pro X Velocity Stack Reviews

    Your review could win you a $100 or $500 gift card!

    Each review submitted enters you into a $100 gift card monthly drawing, and a $500 gift card quarterly drawing!

    0 of 0 people found this review helpful.

    very happy

    Comments On Jul 27, 2013:Easy to install. Fit perfect. I did too many mods at once to tell if added any power. The throttle response does seem a little quicker but I didn't have an issue with it before. I would recommend it.

    Was this review helpful?

    5 of 5 people found this review helpful.


    Comments On Dec 28, 2010:I just bought a new 2010 CRF250 and I thought that I would give this a try since it decreases the size from 50mm to 46mm on the input side of the throttle body (airboot side). I am actually impressed, it gave it more down low ( the engine is a mostly a mid-top performer) and more mid with a slight loss on the top. This is by far the best bang-for-your-buck when it comes to a performance part for your 2010 (or 2011) CRF250!

    Was this review helpful?

    RM Cash ProgramParts Finder