Mini Cooper R56 Prince engine Supertech valve spring set SPRK-MC56BE

Seat pressure - 70lbs @ 33.6mm
Open (lift) pressure - 163lbs @ 10mm
Spring coil bind - 22.20mm
Rate - 9.70lbs/mm
Max lift - 11.40mm
Outer diameter: 23.50mm/16.50mm
Inner diameter: 19.30mm/12.30mm

Set includes:
Beehive springs: 16 pcs. SPR-MC56BE
Titanium retainers: 16 pcs. RET-MC56/T1