^ 525 Mm X 467 Mm [Lxh] (20.7 X 18.4 ) 2-Door And Largest Racing Cars; Meets All Applicable International Standards (Eg Sfi / USA / Nascar And Fia Annex J) ^ Large Window Specifications ^ Net Homologationsfisfi (Nascar) Approved. Complies with German Racing and the FIA Appendix J Regulations. No Net Hardware Quick Release Window. Size II (525 X 467 mm).