I DOWNLOADED AND FOLLOWED
the SCCA rule book in material specs and compared to others out there when I made this
SCCA/NASA RULE BOOK STATES IT NEEDS TO BE 1.25 inch DIAMETER DOM STEEL WITH A .120 WALL THICKNESS. other than that, a harness bar is required to mount from seat belt mount location on the B-pillars and thats it...
I USED DOM 1.25 Dia x .125 wall. - BEATING EXPECTATIONS (by .005 on wall - lol)
The radius rods are swedged brushed aluminum rods 3/4 OD tapered to about 1/2 OD on ends, then threaded to 3/8 inch, with left hand thread on one end and Right hand thread on the other end. The opposite threading allows you to turn the rod and tighten down the harness bar stout.
3/8 dia. rod ends used with 3/8 inch quick pull pins with rings.
I had the welder/machine shop make them. I have test installed and they fit perfectly on all year model Z's
THIS BAR ALLOWS FOR THE SEAT BELT EXTENDER TO REMAIN ON.
ALSO HAVE FIRE EXTINGUISHER/CAMERA MOUNTS FOR THEM:
Fire extinguisher mounts, black or red = $75 shipped.
THESE ARE MADE TO ORDER, SO CONTACT ME AND I CAN GIVE YOU A TIME FRAME - Usually 5 day fab time.
SATISFIED CUSTOMERS PAGE - MORE
Sold bare steel - UNFINISHED: $485 shipped - lower 48 stages.