Two different sets of breather bolt kits Twin Cam version is 3/8"-16x1-1/2" 100-2144, Evolution Big Twin is 1/2"-13x1-1/2" 100-2145 Both come with 2 bolts and 4 washers.
Description
Two different sets of breather bolt kits | Twin Cam version is 3/8"-16x1-1/2" 100-2144, Evolution Big Twin is 1/2"-13x1-1/2" 100-2145 | Both come with 2 bolts and 4 washers.
