Wilwood Brakes
POWER BRAKE SERVICE IS A W.D. for Wilwood. They don't have a rear brake kit for the G.N.'S, because they don't feel it is a "racing" rear axle.. I could give you pricing, if you like. They have a choice of drilled rotors, and polished or powdercoated calipers. There isn't a gain in piston area with their 4 pistons, though, it sounds good. They have a 2.75" alum caliper, to replace the stock 2.5" caliper. The Wilwood rotor is sturdier, though. The Hydroboost would be a perfect complement to the brake upgrade. The stock caliper is made of cast steel, and is sturdier than an alum caliper, under high pressure. High pressure inside a caliper is like a hydraulic jack, jacking it apart.