I just installed front and rear Shelby GT500 brake upgrade with Brembo 6 piston calipers on my 2011 Mustang GT performance pkg which had 4 piston Brembos. Problem is larger caliper piston area has added pedal travel. Has anyone found a master cylinder with a larger than stock 1.062" bore that will fit factory power booster? Alternatively has anyone found or used a different booster to reduce the pedal travel. I'm also looking at ways to use a vacuum regulator to reduce vacuum to booster from the engine. Still unsure about that one from safety standpoint. Basic question is how are you guys handling pedal travel with bigger brakes on 2011-2014 S197 Mustangs? Not really significant but with new calipers rushing air noise from booster air inlet valve every time I hit brakes is very disconcerting. Anyone solved that problem?