Stock rear rotors are ~9&5/8 x 3/8. Fronts are the same size. Basically, anthing is an upgrade.
Stock rotors will NOT work with the new hubs. I wanted to be able to use them, but there wasn't enough room inside them for the 5x4.75" bolt circle. The smallest you can go on the new hubs is the 11.25" LeBaron upgrade. Not that that's such a bad thing, but it does preclude the use of 14" wheels.
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'87 Fiero GT: Northstar, Getrag, TGP wheels, rear sway bar, rod end links, bushings, etc.
'90 Pontiac 6000 SE AWD: Leaking ABS unit fixed, load levelling rear suspension fixed, still slow
