I know the "Big Red" Porsche callipers will bolt right up to RS2 caliper brackets. What about the smaller Porsche Boxster black calipers? ALA BIRA System 1? Gabriel Caldwell Tsunami Solutions Ltd. #202 - 2055 Boundary Road Vancouver, BC Canada V5M 3Z1 voice: 604.299.5855 fax: 604.648.8158 e-mail: gabriel at ts.bc.ca url: www.tsunamisolutionsltd.com