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Header Tether Install....NHRA Required

Header tethers are now required for NHRA sanctioned events on ANY car that has multi piece collectors, or removable collectors, etc. Or the removable collector need to be stitch welded in place. Not a viable option for the Cobra Jet when you have to remove the collectors and exhaust headers to pull or service the motor.

Here is a picture of an approved tether system just installed on the CJ

Here is the info direct from my rule book:

NHRA Rule Reference

From the NHRA Rule Book on


“Effective Jan. 1, 2014, removable multi-piece exhaust collectors/stacks must be securely fastened with an NHRA accepted header tether to prevent loss of collector/stacks during competition. A current list of NHRA-accepted header tethers is available on”

This amendment regarding welding each primary tube to the collector can be found on

“A rule amendment will be made to the 2014 rule book to allow either an NHRA accepted tethering system or a minimum ½” (half inch) stitch weld located on each primary tube.”

If anyone wants to purchase a tether kit I highly recommend the KFM Kollector Keepers. We just bought 5 sets for the CJ's. Customer service is amazing, Keith makes each set to order based on the application, and he races a sweet 58 Ford.


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