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The Grand Prix helmet by OMP is designed for use in open cars or closed-cockpit cars. The chin bar has screened intake vents and a drinking hose port, and the forehead features three adjustable vents. Three exhaust ports in the rear complete the venting system. This helmet can be converted to an open-face helmet by replacing the face shield with the OMP Sun Visor for Speed and Grand Prix Helmets (Part No. OMP-SC036, sold separately). Pre-drilled and furnished with threaded inserts for HANS anchors (anchors sold separately). Snell SA2010 and FIA 8858-2010 approved. Includes clear face shield. Available in sizes X-Small through XLarge.
|OMP Grand Prix Sizing Chart|
|Inches||20 3/4 - 21 1/2||21 5/8 - 22 3/8||22 1/2 - 23 1/8||23 1/4 - 23 7/8||24 - 24 3/4|
|Cm||53 - 55||55 - 57||57 - 59||59 - 61||61 - 63|