The RaceQuip 337008 is an Adult 19 in. black 360-degree helmet support, the neck collar that sits on the shoulders and upper chest beneath a driver's helmet. Its high-density flame-retardant foam core is wrapped in a woven FRC cover and shaped as a full-round collar with a tapered wedge profile, so the helmet rests on padding instead of directly on the collarbone and shoulder blades during a hard impact. It is a practical upgrade over a plain foam neck roll for anyone running an SFI-regulated SFI 3.3 neck brace in auto racing.
The reason to pay for this version over a generic padded collar is compliance. The manufacturer states that the SFI 3.3 model exceeds the certification with the SFI tag affixed, which makes tech inspection far simpler than trying to verify an untagged piece. SFI 3.3 also requires the padding and covering to be fire-resistant, the support to encircle the full 360 degrees of the neck, and a break with a fastener at the front or side. Those requirements are the real difference between this collar and a budget alternative that only looks similar.
Setup needs no tools or wiring. Slip the collar over your head, seat the wedge so the front sits low on the chest and the back rests on the shoulder blades, then close the Velcro snugly so it does not ride up into your helmet's movement. Because the label reads 19 in., measure your neck and confirm the fit before ordering. Keep the cover clean and replace the collar if the foam core compresses or the cover frays, since either condition reduces the cushioning you are paying for.
The manufacturer states that the SFI 3.3 version exceeds the certification with the SFI tag affixed.
The manufacturer's description gives a fully closed measurement of about 17 inches, with up to about 20 inches if a gap is left in the closure. That does not match the 19 in. label, and sizing details vary, so confirm your neck measurement with the manufacturer before ordering.