247 Rear Brake Application:  Speedway Engineering Mod-Lite Floater Rear End with Aluminum Hubs  Speedway Engineering Grand National Rear End Floater with Steel or Aluminum Hubs  Other Brands of Grand National Floater Rear Ends  Requires Welding Bracket to Axle Tubes Part Numbers, Caliper Color & Pricing: STB #84.RSR.0701.51* Black $2895 STB #84.RSR.0701.71* Red $2895 STB #84.RSR.0701.R1* Trophy $3595 *Trophy Calipers are fully CNC Machined for lightening & style then Gun Metal Gray Anodized StopTech 14” Rear Brakes The ST40 4-Piston Calipers, match perfectly with the front ST60s. We were able to design the BEST rear braking system possible that fits Grand National & Mod-Lite Floater Rear Ends. I utilized larger piston area & the total braking force is amazing! We run a much less aggressive pad … StopTech’s SR30 “Adhesive Technology” Pads … and have AMAZING 3600# of braking force. These are the Mac Daddy of Track Car Brakes. No Fade. Quick Release. Excellent Brake Modulation Characteristics. In short … the Best Brakes. (Racing Brakes = No Parking Brake) Track Brakes