We recommend these springs for serious performance upgrades. KM Cams springs with under guide shim sold in kits sized for om606.962. At this time, kits cannot be split into smaller orders.
13mm max coilbind
Install rate: 32 KG
Lift rate: 67 KG example at 9mm camlift.
12mm max coilbind.
Install rate: 24 KG