XA2.E5 Series 4 Piston Rear Calipers
Typical NASCAR & Road Race Rear Caliper
Lightwieght and Rigid
4 Aluminum Pistons w/ Titanium Vented Inserts
2 Piece Aluminum Body
120mm Radial Mount Centers with 53.5mm Offset
Disc Diameter - Minimum 313mm, Maximum 328mm