All competitors utilizing screw type superchargers, including ET, advanced ET, Top Dragster, TAD, and TAFC categories

The use of an SFI 14.21 supercharger restraint is required. The restraint must be installed as described in the SFI 14.21 specification. Please visit SFIfoundation.com for full details. Of particular concern is the following portion of the spec.

INJECTOR STRAP ASSEMBLY 

For a standard-placement OR forward-placement injector cover, the injector strap assembly is used to constrain the injector body in the event of a failure.  The injector strap assembly shall confine the injector by coverage across the top.  There shall be a minimum of four attachment points on the upper plate.

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