Tomei VALVE SPRING 4G63 KIT LIFT (mm) ~12.0 * Oval Wire * High Lift Type DIAMETER: Height 3.6x Width 4.5 SET LENGTH (mm): 39.6 LIFT LENGTH (mm): 27.1 SUPPORTED LIFT: 11.50 SET LOAD (kgf): 33.6±6% LIFT LOAD (kgf): 82.0±6% REV LIMIT (Ref.): 8000 MATERIAL: SWOSC-VT PROCESS: Nitride Part Number: 161404