need to know socket size 12-pt ARP balancer bolt

[twodafloor]

Any ideas? for another guy says smaller than 21mm

 

[novaderrik]

sometimes ARP does their own thing with bolt head sizes sometimes, but here's a chart that shows the standard wrench size for various bolts:

http://k-tbolt.com/us_bolt_head_wrench_table.html

summit says it's a 3/4-16 bolt, so going by that chart it would be 1 1/8"..

 

[twodafloor]

Thanks for the link and reply- just went over to the guys shop and it seems to be a 13/16 or 21mm. Thanks again.