lol i was told they wouldnt work but i didnt believe them... they said the s1 heads with doubble valve springs wont take single ones... yet the only diffrence is the top cap that u put the clips in is like like 1mm smaller heres a picture of hte valve springs... so if anyone needs to know they do fit and do work so dont spent $150 on doubble springs when u can get singles for $60
You arent worried about valve bounce or anything then? How high are you planning to rev this engine? It would prob be alright, but they would have fit double valve springs for a reason
dude the singles are tighter than the doubbles ALOT tighter the Crow ones wont bounce (vp_luke uses them) when i got them in the compressor the doubbles and singles were both soft and the crow cam ones were a hard to compress i doubt ill be valve bouncing much