6-bolt Hub Adaptors come in two circle diameters, you can get some like the jboss kit on ebay with both... but this is what I've tentatively extrapolated as to compatibility:
size 1:
Momo, Nardi, Personal, Abarth, Indy, Raid, and Italvolanti Boss kit
size 2:
Sparco, Grant, Bride, ....?
and I've seen no actual number to go with the circle diameter
size 1:
Momo, Nardi, Personal, Abarth, Indy, Raid, and Italvolanti Boss kit
size 2:
Sparco, Grant, Bride, ....?
and I've seen no actual number to go with the circle diameter
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