Honda CRF 450 2009-2016 Race Engine Valve Spring Kit Whether you roll with a stock cam, Webcamshaft, Pro Circuit or Megacycle cams, this kit is your golden ticket for both small lift and big lift engines. It's not just a spring kit; it's your engine's new best friend, a surefire must-have for all race engines that require durability and performance! Hurry, grab yours now - these kits are speeding off the shelves as there are less and less of these kits out there and no more production from Ferrea!