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Made for B230s, this upgraded spring package saves about twenty grams per valve improving valvetrain stability and RPM capability. Spring pressures are not terribly high making these a good upgrade for stock or close to stock RPM limits (less than ~7000 rpm or so).
Available in high and low lift form, and includes retainers.
Two installed heights available: 37.5 mm and 36.4 mm. The latter offers slightly more seat pressure at the cost of total available valve lift. Beehive springs should be shimmed to as close to bind + 1 mm (for clearance) as possible for optimum performance.
Spring force:
62 lbs @ 37.5 mm
160 lbs @ 25.5 mm
Bind height: 23.9 mm
Always check your installed height and coil bind!
Made for B230s, this upgraded spring package saves about twenty grams per valve improving valvetrain stability and RPM capability. Spring pressures are not terribly high making these a good upgrade for stock or close to stock RPM limits (less than ~7000 rpm or so).
Available in high and low lift form, and includes retainers.
Two installed heights available: 37.5 mm and 36.4 mm. The latter offers slightly more seat pressure at the cost of total available valve lift. Beehive springs should be shimmed to as close to bind + 1 mm (for clearance) as possible for optimum performance.
Spring force:
62 lbs @ 37.5 mm
160 lbs @ 25.5 mm
Bind height: 23.9 mm
Always check your installed height and coil bind!