[ColoradoCobras.]

If you haven't drilled and wired your Header Bolts, are you tired of tightening Header Bolt Fasteners?
From the SEMA show, Coloardo Cobras now has the patented Split Lock fasteners available.

This is an Allen bolt with-in a Header bolt.

After installing the Split-Lock™Locking Fastener header bolt, you use a high quality hex key wrench to tighten the set pin to expand the split tip of the fastener to friction lock the fastener in place.

This actually forces the threads, that are on the fastener, into the root of the threads of the threaded hole or nut to lock the fastener. This operation also locks the set pin by spreading the split tapered seat in the fastener to lock the set pin.
The fastener can be removed by simply loosening the set pin and screwing out the fastener.

The Split-Lock™ Mechanical Locking Fastener can be used over and over with the same effect. Vibration, heat or torque dependence will not affect its locking ability. heat or torque dependence will not affect its locking ability.
Split-Lock™ fasteners can be used over and over with the same locking effect.

Prices range from $70-90 plus shipping and handling, depending on engine application.