|  |  Bolting on STi Brakes
The biggest, baddest brakes available to date from Subaru are the STi Brembo brakes, using a mammoth monoblock four-piston aluminum caliper in the front, along with a huge 12.7" rotors. Most late-model Subaru cars share the same front brake mounting, so you can bolt up these front brakes to almost any 2002+ Impreza, Forester, or Legacy. Keep in mind you'll need wheels to clear these large brakes, which means at least a 17" wheel. And just having a 17" wheel doesn't guarantee fitment either, because the wheel needs to have enough spoke clearance to fit over the caliper.
Note that only 2004 WRX STi rotors are going to bolt to the other cars, because they share the 5x100 bolt pattern. 2005+ STIs have a 5x114.3 bolt pattern, and the rotors will not bolt up to the 5x100 cars.
The REAR STi Brembos will NOT bolt to the 2002-07 cars easily, for two reasons. One is that there's a caliper mounting bracket that is different. And even if you had a bracket that would allow you to hang the caliper on, the inner diameter of the STi rotor is larger than that of the other cars, so the parking brake that fits in there would not reach the rotor. The Brembo upgrade kit we sell comes with both the caliper mounting brackets AND special rear rotors that are large on the outside, and smaller on the inside to fit the non-STi parking brake.
For 2008 WRX models, ANY front Brembo caliper (older gold color or newer black color) will bolt to the front of the car. You'll need 5x100 drilled STI front rotors to fit. On the rear of the 2008+ WRX, the older gold rear Brembo caliper will NOT fit, but the newer 2008+ black STI rear Brembo caliper WILL fit. Again, you'll need a specially drilled STI rotor to bolt on with the caliper. We sell those rotors HERE.
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