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Pro X Steel Exhaust Valve/Spring Kit
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Pro X Steel Exhaust Valve/Spring Kit

Our price: $114.99$126.99

MSRP: $126.95 - $141.06 - You save up to $14.07 (10% off)

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  • "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

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    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.

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    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.

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Additional Videos

How to replace the valves on your motorcycle or atv

How To Adjust The Valves On A KTM 500 XC-W Motorcycle

Pro X Valve Spring Kit

How to adjust the valves on your motorcycle or atv - Shim Type

RM YouTube Channel


    The Pro X Steel Exhaust Valve Spring Kits are manufactured so close to OEM specs, you can reuse your stock retainers, bases, and seals without any modifications. It all begins with a 21-4N stainless steel valve that is black nitrided for an unprecedented combination of core strength and surface friction reduction. Then comes the chrome vanadium, heavy duty springs built specifically to handle the extra weight of the steel valves. Even at high rpms these springs hold a tight seal, so your valves won’t flutter or float even after seasons of you being heavy on the throttle. Everything comes together to create a valve kit that restores compression so your machine runs at peak performance.

  • Aftermarket steel valve and spring kit for your dirt bike or ATV
  • Kit comes with all valves and valve springs
  • Fully compatible with OEM retainers, bases, and seals
  • More durable than OEM
  • Less valve adjustments
  • Pro X tappet sets available
  • 21-4N stainless steel valves
  • Valves have black nitride coating
  • Heavy duty chrome vanadium valve springs

Pro X Steel Exhaust Valve/Spring Kit Reviews

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Comments On Jan 08, 2014:Great product for the price when your a racer. Pro X hasn't failed me yet!!!

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Great Valves

Comments On Jun 11, 2013:These valves are great. When I rebuilt my bike I redid my head (cut the valve seats) and then installed these Pro-X steel exhaust and intake valve kits with new seals. Bike started in 2 kicks and has been going strong since. It's been about 3 months and I've been racing nonstop since then with no problems. Still starts in about 2 kicks, and I haven't even had to re-shim them.

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pro x valve kits

Comments On Aug 14, 2011:i bought a complete set for my 05wr450f and they went right in after shimming the up to spec and setting the timing the bike fired right to life again these are a nice upgrade over the stock titanium valves id do it all over again with pro-x products

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