Product SKU# 18562 3mm hydraulic lifters, fits Evo Models 1-9. If you are experiencing “ticking” noise at idle, our revised sprung loaded hydraulic lifters are the solution! Comes in a complete set of 16Note: These are supplied primed and ready to install, do not attempt to bleed prior to installation. When the lifters are freshly installed it can take a few minutes for them to find to find there level. Slight loss of compression is normal during this period as the valve can be held open slightly.