Everyone at the track I talk to with solid rollers check/replace them every two years but they are trailered race cars. I had one go after one year and tore up the motor pretty good but I log about 60 highway miles a week to the track and back on top of the racing. Replaced the comp lifters with isky hippo lifters but will check them this week before the season starts. Been told you should run a rev kit if driving on the street... Keeps the roller on the lobe but costs about 40hp I don't have to spare... If you're going max effort 800hp and street driving you should consider it. If only racing... Check lifters every 2 years.

-Chris