(MARRS-RX7) Roll call bar

John Uftring johnuftring at gmail.com
Mon Dec 23 23:44:23 CET 2019

Check the spec7 rules for the Autopower bolt-in cage part number to be
sure, but if I recall correctly it's made from drawn over mandrel (DOM)
mild steel, tubing outer diameter is 1.5", wall thickness of .120". If you
can, look for a shop near you that does cages (where I am in NC I'm lucky
to have a few to choose from, including one ~10 minutes from my house) they
should be able to make up and install the second tube and bracing for you.

The other option is to measure the roll cage diameter near the inspection
hole(s). You will want to measure the diameter, and then the depth through
the inspection hole. Then subtract the depth from the diameter to get the
wall thickness.


- John Uftring (lazy, slacking, no good, non-racecar driving for a long
time SOB)
  #94 SRX7

On Mon, Dec 23, 2019 at 5:07 PM Alex C via Spec7 <spec7 at lists.specrx7.com>

> sorry for the quick question guys. I just found out that next week I have
> access to a tubing bender and a welder at a shop in Fairfax so I need to
> order some of the safety equipment quick. I'm still trying to wrap my head
> around the GCR so I needed to ask two quick questions
> 1)is there someone who makes a bar for the passenger side to bring the car
> up to spec that can just be welded in? If so does someone have his contact
> information?
> 2) if I have to buy the bar material on my own I can do that oh, but I need
> to know the bar type and thickness and order to do so. Again still wrapping
> my head around the GCR and I want to make sure that I get the right part
> ordered here in the next few hours.
> Any help would be appreciated, as always!!
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