BMW 3er / M3 / M4 N55B30 S55B30 Ferrea išmetimo vožtuvas STD F2428P

Spring data:
Seat pressure - 75lbs @ 36.50mm
Open (lift) pressure - 155lbs @ 10.00mm
Spring coil bind - 23.20mm
Max lift - 12mm
Rate - 8 lbs./mm
Wide end spring outer diameter - 24.40mm
Wide end spring inner diameter - 17.60mm
Narrow end spring outer diameter - 21.00mm
Narrow end spring inner diameter - 14.30mm

Kit includes:
Single springs - 24 pcs. SPR-FE20N54-BE
Titanium retainers - 12 pcs. RET-BMN54-TI (5mm)
Titanium retainers - 12 pcs. RET-BMN54-TE (6mm)

Product detailed specification
Model number	BMEVI-1055S-HS
Head diameter	28.00mm
Stem diameter	5.96mm
Length	112.9mm
Material	Sodium filled
Fits for	BMW E90, E91, E92, E93, E82, E88, E89, X6, Z4, F01 - 3.0 (N55B30, S55B30)

Ferrea Competition Plus Valves have built a reputation as the industry's most reliable extreme duty valve. To manufacture the valves we use special aerospace quality alloys, including the EV8-Z18, which provides high tensile strength. An exclusive two-step slow forging process ensures proper grain flow and virtually eliminates any damage to thematerial structure. The valves are then heat-treated and stress-relieved over a 48-hour period, which is the crucial base of our molecular integrity. These valves feature avionics-quality hard chrome along with a specially applied hard tip.