Brembo GT-A Big Brake Kit — PORSCHE 997 CARRERA 2S / CARRERA 2 GTS 2005–2011 (Rear, 345x28 4-Pot)Brembo GT M Big Brake Kit PORSCHE 997 CARRERA 2S CARRERA 2 GTS 20052011 (Rear, 345x28 4 Pot) Genuine Brembo GT M GT S GT R 4 piston monobloc rear big brake kit engineered for the 20052011 PORSCHE 997 CARRERA 2S CARRERA 2 GTS. Upgrade to Brembo's 345x28mm 2 piece floating disc assembly for greater thermal capacity, reduced fade, and linear pedal feel on the street or the track. Key specifications Caliper family Brembo GT M (4 piston Monobloc) Disc size