Paris,
What engine do you have? If it's a z6 like your sig says you don't need springs n retainers unless you're gonna run a retardedly high lift cam and plan on reving to to the moon.
This is jfk78's vitara motor. It has stock y8 valves, springs, retainers, with a 59300 leaning on them:
Speedfactory 10 sec SOHC VTEC compilation vid.- Video
All of these oco experts buy bisi's parts n run thirteens n/a. Then they tell everyone on here to do the same... idk why... maybe 'cause they think a 13sec honda is fast...