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Who is using them on a race car? what do you like? dislike? I know what the rule book says, but at what point do you feel the need for the more expensive SFI spec wheels? 
I have them on my car...its not that fast at 10.20's and 3800 pounds on drag radials.mostly street use with 5/8 studs a spool metal valve stems and wheel screws in the rear. Hoping they go faster in the near future! Only bad part was clearance in the rear for wilwood disc but changed the bacspace to 4.5 instead of 5.5 when building the rear end.
'33 Plymouth 5 Window Coupe Blown Aluminum HEMI w/bolt ons (under construction)
'69 Chrysler 300 Convertible 375 HP 440
'71 Plymouth Duster 360 W/EFI (Wife's Ride)
'12 Ram MegaCab Dually 6.7 Cummins
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