Our disc brake conversion kit is for 1947-59 Chevy and GMC trucks and is a great way to upgrade your straight axle to disc brakes and keep the original 8 lugbolt pattern. Performance Online’s disc brake conversion utilizes all new components. No more having to use “old” original hubs and upgrading to taperedroler bearings.Kit will not work with 15″ stock type wheels unless they are modified for disc brakes. Kit will work with 16″ artillery wheels regardless of being modified or not. Great for the enthusiast who wants the added safety but Classic look