these are awesome cams, they make great USABLE power. i had these in my 12:1 Type-R motor and loved them.

i actually talked to one of the rep's from toda and he said they recomend their valve springs due to they were designed around their cams. but he said other's will work and he gave me the spec's on their springs to compare others too. i had the JG engine dynamics dual springs/retainers and had no issues... good luck with the sale.

oh and you dont even want to know how cheap i got my set for