Thirdgen F-body Spindle Brake Upgrade Bracket Design
I have designed two brackets to mount the 89-96 Corvette C4 and 98-2002 F-body "LS1" front brakes on a third generation F-body.
The C4 12inch and 13inch HD setups use the same bracket. When using a C4-HD (13 inch) brake setup this bracket needs to be 1/2 thick to properly position the caliper mounting bracket. I highly recommend having the bracket cut out of 3/8 inch steel and using two 1/8 inch shim or washers to space the caliper mounting bracket out to reduce sprung weight. Bear uses 5/16 inch thick brackets so it would be safe to use that thickness also with a 3/16 inch shim or washer.
Corvette C4 HD & Non-HD Setups:
C4 Bracket with Dimensions (AutoCAD File)
C4 Bracket (AutoCAD Version 2000 File)
C4 Bracket (AutoCAD Version 2005 File)
C4 Bracket (PDF File)
(Holes labeled "C" is where the caliper mounts, holes labeled "S" is where the bracket mounts to the spindle)
98-2002 F-Body "LS1" Brakes
LS1 Bracket (AutoCAD File)
LS1 Bracket (PDF File)
Corvette C5 & C6 Brakes
This bracket will work for all C5 brake, C6 Std JL9 (12.8" rotor), and C6 J55 Z51 (13.19" rotor). This bracket will not work
with C6 Z06 brakes.
C5 & C6 Bracket (AutoCAD File) this bracket was put into CAD by
Thirdgen.org member Vexter
C5 & C6 Bracket (PDF File, legal paper size)
Original 12-inch Baer Brakes Bracket
This bracket is designed to be used with a baer brake caliper carrier (abutment bracket) . From my research it seems Bear
brakes used a corvette C4 13" caliper carrier or similar. It may be possible to use the 13" C4 caliper with 12 inch rotors but
has not been tested.
Stock Baer Brakes Bracket (AutoCAD File)
Stock Baer Brakes Bracket (PDF File)
You can download a free .dwg fileviewer here:
Autodesk Design Review
Page created: January 2006
Page content last updated 06-14-2009