Isaac Head and Neck Restraint System



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Isaac® Product & Service Information

(Click Here For Performance Comparison Chart)


Isaac® systems are available in several models: The Link™, Basic, Intermediate and Titanium models for adults, and the Kids!™ and Quarter Midget models for young drivers. You can even rent an Isaac® system for a race weekend (Link™ model excluded).

Isaac© Link™: ($199) Our entry level model. An excellent value.

Intermediate Isaac®: ($895) Our most popular model, the Intermediate is the same as the Basic model but equipped with aerospace grade positive-lock, quick-release pins.

Titanium Isaac®: ($3,250) Made to order with all structural components machined from high-grade titanium alloy. Please allow six to eight weeks for delivery.

Kids!™ Isaac®: ($625/$795) Identical to the Basic/Intermediate model,but uses shorter shock absorbers for the smaller driver.

Quarter Midget Isaac®: ($625/$795) Same as the Kids!™ Isaac®, but with a smaller belt connector for the 2" (50mm) wide belts found in quarter midget racers.


General Information
Isaac® systems establish a connection between the head and the shoulders. Actually, they connect between the helmet at one end and roll under the shoulder harness at the other end. The driver does not "wear" an Isaac® product, it becomes part of the harness system. Helmet connections are made with quick release pins so Isaac® can be used by any driver having a set of helmet mounts. Extra helmet mounts are available separately and are installed by the user. The system can be easily moved between vehicles. The Isaac® shock absorbers are custom designed and manufactured to specifications established after multiple computer simulations and laboratory crash tests. The Isaac® Link™ system uses mil spec parachute webbing rather than a shock absorber assembly.

Mounting instructions and all mounting hardware are provided to attach the mounts to the helmet. An exclusive aerospace-grade adhesive is also available for racers who do not wish to use nuts and bolts or drill holes in their helmet. No special tools are required.

Isaac® systems are available in several models: The Link™, Basic, Intermediate and Titanium models for adults, and the Kids!™ and Quarter Midget models for young drivers.


The Isaac® Link™ ($199)
The new Isaac® Link™ was designed for racers who are on a tight budget and want a good head and neck system, but don't want to invest in a great one. It doesn't work as well as other Isaac® systems, but is the best product every tested in the under $500 range. The Link™ uses certified mil spec parachute webbing (not dog leash material) in place of the damper assembly to reduce costs.

Intermediate Isaac® ($895)
The mounting structures are CNC machined from 6061-T6 aluminum alloy and supplied with a black anodized coating. The shocks connect to the mounting structures with spherical rod ends CNC machined from 300 series stainless steel. The belt roller is CNC machined from 6061-T6 aluminum alloy and the belt shear pin is made of 300 series stainless steel. The helmet connection detent pins are made of corrosion resistant 440C, 17-7PH and 300 series stainless steels meeting quality specifications QQ-S-763, AMS 5678, ASTM-A-313, or ASTM-A581/582.


The helmet positive-lock, quick-release pins are military grade (MIL-Q9858) made of corrosion resistant 440C, 17-7PH and 300 series stainless steels meeting quality specifications QQ-S-763/766, QQ-A-225/6, QQ-A-225/5, AMS 5643/5657/5678, ASTM-A-313, or ASTM-A581/582. These pins are easily installed and removed by depressing a release button on the end of the pin. Optional dual-acting, push/pull quick-release pins are also available.

The Intermediate Isaac® is shipped in a plastic case with foam padding.

Titanium Isaac® ($3,250)
The Titanium model is designed for extreme impact environments. It replaces the aluminum and stainless steel components of the other models with a special grade titanium alloy. This model is individually assembled for each racer with their choice of multiple style pins for both the helmet and belt connections. Call for details.

The increased performance of this model comes from the extensive use of a high-grade, corrosion-resistant titanium alloy known as "T64ELI", or Ti-6Al-4V ELI, per ASTM specification F-136. It is pure titanium alloyed with 6 percent aluminum, 4 percent vanadium and processed in an "extra-
low intersticial" manner to improve corrosion resistance. This alloy has a very high strength-to-weight ratio and is used in nuclear reactors, military aircraft and structural biomechanical implants.

The Titanium Isaac® is shipped in a reusable, airtight, waterproof, impact-resistant container. It is supplied on a made-to-order basis. Allow six to eight weeks delivery. $500 (USD) deposit required.

Kids!™ Isaac® ($795)
The Kids!™ Isaac® is identical to the Basic/Intermediate model, but uses shorter shock absorbers for the smaller driver. As the young driver grows, longer shocks can be used. They can't outgrow an Isaac® system.

Quarter Midget Isaac® ($795)
Same as the Kids!™ Isaac®, but with a smaller belt connector for the 2" (50mm) belts found in quarter midget racers.



copyright © 2003-2013 Isaac, LLC
U.S. Patent #7,155,747
other domestic and foreign patents pending
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