High performance valve spring kit for M8 models with conical single wire (beehive) style springs. Kit includes beehive springs; steel top collars; bottom collars / seals and valve spring keepers. Compatible with cams providing up to .605″ valve lift. 1.535″ installed height; seat pressure 68 lbs; 324 lbs@.605″; max RPM 6500. OEM replacement reference 18100043

