Disc Brakes
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This photo shows an '87 GTA rear end with disc brakes. These are the smaller pre-'89 10.5-inch iron caliper units, but they're mounted on a 3.27 limited-slip 9-bolt. If you're working with a 3.08 or higher open differential, you'll see a substantial performance increase from this swap. The '89-and-later disc cars were upgraded to the better 1LE rear brakes. Also pictured are the rear WS6 springs. Drop the shock mounts and they virtually fall into your hands. View Related Article
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