This FIA & MSUK 2025 Seat Rail Kit features all you need to fit your seats to the latest FIA standards.
Each kit contains:
- 2x Seat Rails of Length 720mm 35mm X 35mm X 2.5mm Box - 25CrM04 as prescibed by the FIA
*FIA & MSUK requirements stipulate Square Extruded Box material (NOT WELDED)
*Boss positions to 390mm centres - M
- 4x M8 Threaded Insets to be Welded into Rails (EN14 Steel)
- 8x Pre-Drilled End Plates - TO MS UK Thickness of 3mm (CR4)
- 8x 30mm - M8 Cap Head Bolts (12.9)
- 8x Weldable M8 nuts
- 8x M8 Washers
- 8x M8 Spring Washer
Not to be mistaken for low grade box material
25CrMo4
A Continental/European spec, very similar in terms of properties to T45.
- Much lower quantities of Manganese, but higher Chrome content.
- Almost identical in terms of composition and properties to 4130
- Readily weld-able with the correct procedures.
Properties:
- Yield strength – min. 600 MPa.
- Tensile – 700 – 900 MPa.
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