I used some 14 x 1 on my uprights to use a 12mm bolt, but there's no reason you cant drill/bore out the crush tubes to 14mm and use a 14mm bolt which may be a better option in the states if the tube is hard to come by or going to be expensive to get hold of.
Cheers
Stot
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1.6 Mazda B6 : Garrett TBO339 : 420cc WRX Injectors : FMIC : Microsquirt V3 : LC-2 Wideband : Toyota COP : 1.8 ATB LSD
Build Started Jan 2013 : OTR Aug 2014 : Still OTR June 2024
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