I have done some exstensive research and finally cam up with some information. I am currently about to install obx camgears on my 2000 si and do not want to screw up. First thing to do if you are worried about slippage is to replace to hex bolts with bolts that accept a socket. I replaced mine with 8mm 1.25 bolts. I picked them up at home depot and are zinc plated. I had to cut them to length though. This allows you to torque the bolts to the typically required 15lbs/ft of torque. The site I found also sayed the new aem cam gears have new integral washer flanges which also keep the bolts from coming loose. Well thats all i have beside what others say... Tune, Tune, Tune! Iwill let you know how mine turn out.