I used 2.75" calipers with ceramic pads & they were adequate around town & I never needed to challenge em so I dont know how they'd be under performance conditions. The R calipers are all 2.75" & the bleeder location would likely be different on em & not sure how they interchange & reportedly (by Andy) Andy's bible covers that subject very well. If I wanted more I'd get some 11&3/4" horseshoe adapters/ 11&3/4" rotors. They take the same calipers & I'd do a bed in procedure with some performance pads