Reinforced Valve Springs BMW N53B30 N54B30 N55B30 S55B30

Reinforced Springs kitsSUPERTECH and FERREAare composed of24 Springs and 24 cups.

Technical characteristics

• Springs type: single conical
• External diameter of the conical spring: 24.40/21.00 mm
• Inner diameter of the conical spring: 17.60/14.20 mm
• Tare / Length mounted: 34.02kg @ 36.50mm
• Tare / lift: 70.31kg @ 10.00mm
• Max lift: 12mm
• Reference: SPRK-FE20N54-BE

Supertech Valve Springs are made from high quality chrome silicon vanadium steel alloy. This alloy has the advantage of offering superior performance and reliability, especially at high speeds, and has better structural memory. Supertech Reinforced Valve Springs are computer designed to ensure harmonics remain under control and stress levels remain within material fatigue diagrams.

The Supertech cups are made of titanium alloy and machined by numerical control in order to obtain the best fit.

Technical characteristics

• Springs type: single
• External diameter: 22.38 mm
• Inner diameter: 15.52 mm
• Tare / Length mounted: 31.75kg @ 36.50mm
• Tare / lift: 77.11kg @ 26.5mm
• Max lift: 12.5mm
• Reference: KT4026

As with Supertech, Ferrea reinforced valve springs are made from chrome vanadium steel and receive a heat treatment. These Ferrea Springs are developed so that harmonics and fatigue at high revs are under control (allows you to avoid springs entering into resonance), they provide stability and reduced wear on the COMPONENTS of the Cylinder head. The design of these Springs also makes it possible to limit pressure loss.

Machined by numerical control, Ferrea cups are made of titanium.