Bought a underdrive crank pulley the other day and noticed it does not have the harmonic balancer included in the pulley. The whole point that i bought the pulley is because on my stock pulley the balancer seperated from the pulley. So im not for sure what i need to do with the new underdrive pully. Can i reuse the balancer from my stock one and some how transfer it. Or do I need to find a new one. If so is that a oem product only? Cause i can't find one anywhere else