You ask a lot from your flexplate. The forces they're put under are extreme and in high performance applications the flexplate can slip even with correctly installed and torqued bolts It only takes a small amount movement for the bolts to loosen and allow the flexplate to oscillate against the crankshaft causing costly and catastrophic damage to both parts. BD Diamond Bite Shims with a diamond embedded electroless nickel coating create a micro - bite between the flexplate surfaces giving a significant friction increase. This friction increase stops your flexplate from slipping, allowing it to handle the much higher torque loads expected from a diesel engine. Recommended for high output and heavy duty cummins 1994 - up 5.9L6.7L applications.