The NHRA just announced a major update to its safety rule guidelines, mandating a head and neck restraint system for any vehicle running 150+ mph starting January 1, 2024.

Here’s the updated section from the new 2024 NHRA rulebook:


Neck collar must be commercially produced and designed for racing. Two different types of collars are commercially available: a full 360-degree “donut” type or a pull-together “horseshoe” type. Modification according to manufacturer’s recommendations to fit helmet and driver’s neck/shoulder spacing permitted. Must be worn as per manufacturer’s recommendations. Must meet SFI Spec 3.3 as per class rules.

Neck collar meeting SFI Spec 3.3 mandatory in all open bodied cars and any car running 9.99 (6.39) or quicker or cars exceeding 135 mph. A head and neck restraint device/system may be used in lieu of a neck collar.

A head and neck restraint device/system meeting SFI 38.1 is mandatory for any vehicle running 200 mph or faster or running 7.49 (4.49) or quicker or by Class Requirements.

Rev. 3-23-23 Beginning January 1st, 2024, A head and neck restraint device/system meeting SFI 38.1 is mandatory for any vehicle running 150 MPH or faster for 1/4 or 1/8 mile or running 7.49 (*4.49) E.T. or quicker or by Class Requirements.

(Image/Simpson Racing)

The good news is that Simpson Racing has a trio of SFI 38.1 Head & Neck Restraint models to make sure you’re up-to-date with these new safety guidelines. Here are the details:

  • Simpson Hybrid Sport Restraints are a smart choice if you’re racing on a budget. They’re lightweight, yet strong, durable, and comfortable. The Hybrid Sport restraint is race ready and features a low profile design that makes it easy for you to get into and out of your race car.
  • Simpson Hybrid Pro Lite Restraints carry both SFI 38.1 certification and FIA 8858-2010 approval, delivering what Simpson describes as the “ultimate in safety and comfort.” The Hybrid Pro Lite design allows for excellent maneuverability too, without sacrificing a stitch of strength or weight savings.
  • Simpson Hybrid S Restraints are FIA and SFI approved and currently the only frontal head restraints proven effective for three-point harnesses. The Hybrid S is also third-party tested to FMVSS208 standards. When used with a Snell- or FIA-rated helmet and three-point harness, the Hybrid S Restraint reduced neck tension significantly when compared to a test with only a helmet and three-point harness.

All told, Simpson Racing will help ensure you’re ready for these updated guidelines set to take effect in January for the 2024 NHRA Race Season.

wilkerson racing funny car driver in stilo helmet and simpson harness
NHRA Funny Car driver Tim Wilkerson readies for a run during the 2023 NHRA Gatornationals. (Image/Auto Imagery)