crower turbo cams

[bsurge]

i am building a setup with a b18. i was looking at the turbo cams that crower makes for the b18 FI setup. it says that to run the cams u need the crower dual valve springs and TI retainers. i got my cylinder head completly rebuild with 5 angle valve grind, port n polish etc....... full race build. do i really need their retainers cuz the ones in my head are brand new??? what will happen if i install these and dont use their retainer kit??