Just to put the gen 6 SS 1LE braking in perspective check out this list of the best braking cars. The gen 6 SS 1LE is only beaten by some racecars that shouldnt have even been included on that list, gen 7 wide body Corvettes, the gen 6 ZL1 1LE, the Viper ACR, 991.2 911 Turbo S, the Ferrari LaFerrari, and the Lamborghini Sesto Elemento. Other than changing the brake fluid for track use as recommended in the owners manual I dont see any reason why it would be worth messing with the brakes. You will probably just end up making things worse. Also worth noting is that most of those cars that beat the gen 6 SS 1LE in braking are running R compound tires.
http://fastestlaps.com/lists/top-qui...stoppers-60mph