Originally posted by GNSCOTT
Baer rotors do not warp.
Au Contraire! Baer rotors on most of their kits are still PBR units unless you opt for some sort of super duper cross drilled, zinc washed, cryo'd, ultra sonic rotors.
The stock PBR units on the 12" brakes are cast iron and will warp just as easily as the 1LE Fbody/b body rotors.
As a matter of fact, if you want to see the main reason GM went with 13" units on the Z51 vettes in the early 90's, just look at the difference in rotor thickness and feel the weight difference. The rotors are approx 3/8" thicker and about 5lbs heavier on the 13 inchers.
The main difference between a Baer racing kit and installing b body spindles and 1LE rotors is this:
#1 B body spindles require a different upper control arm to get the alignment correct where as Baer will convert a set of stock G body spindles so you dont have to replace your stock control arms. However, Baer will also modify B body spindles for the guys who want to gain the better handling traits that come with the B body spindle.
#2 B body spindles are set up to use the standard single piston cast iron calipers. Baer racing gives you options such as different styles and brands of aluminum calipers. The most common is the aluminum twin piston PBR units that come on many domestic performance cars. Most common were the 84-up Corvettes, 87-92 1LE F bodies, 89 TTAs, all 98-2002 F bodies. Baer can do this because of their modular mounting plates that allow the mounting of the calipers.
#3 The B body brakes require you to disassemble the wheel bearing to remove the rotor. The Baer set ups use pull off rotors (but still have serviceable wheel bearings in their hubs)
You might save a little weight and gain some breaking power with the PBR calipers that Baer installs, but you wont save any money over a B body spindle swap. Robert Adams
http://gparts.freeyellow.com/
offers a complete kit with EVERYTHING you need for $720 (that includes spindles). If I remember correctly, the Baer kit is approx $500 more for their standard set up and the price goes up from there as you pick and choose different options.