GP 310 Front Motorcycle Caliper: View Caliper Description Polished Chrome Front Left Hand Caliper (single) 1984-1999 120-7737-P 120-7737 Front Right Hand Caliper          1984-1999 120-7736-P 120-7736 Front Left Hand Caliper (single) 2000-Present 120-7739-P 120-7739 Front Right Hand Caliper          2000-Present 120-7738-P 120-7738 Optional Mounting Bolt Kit, P/N: 230-6330 Click here for more information and to purchase GP 310 Rear Motorcycle Caliper: View Caliper Description Bracket Not Included Polished Chrome Rear Right Hand Caliper (Std 3.50" Mount) 120-7740-P 120-7740 Rear Left Hand Caliper   (Std 3.50" Mount)* 120-7741-P 120-7741 Optional Mounting Bolt Kit, P/N: 230-4236 * Use with Dyna "Bottom" Bracket Kit Click here for more information and to purchase GP 310 Rear Motorcycle Caliper Brackets: View Brackets GP 310 Rear Bracket Description Polished Chrome Softail® Bracket Kit                 1984-1999 250-8035-P 250-8035 Softail® Bracket Kit                 2000-Present 250-8036-P 250-8036 Dyna Bracket Kit                          1984-1999 250-8034-P 250-8034 Dyna Bracket Kit                          2000-Present 250-8033-P 250-8033 Dyna "Bottom" Bracket Kit*    1984-1999 250-8252-P 250-8252 Cruiser Bracket Kit                 1984-1999       Call for Availability Cruiser Bracket Kit                 2000-Present       Call for Availability Optional Mounting Bolt Kit, P/N: 230-4236 is included with Brackets *Locates caliper on the bottom side of the rotor, use with left hand GP 310 rear caliper. Click here for more information and to purchase GP 300 Front Motorcycle Caliper: View Caliper Description Polished Chrome Front Left Hand Caliper (single) 1984-1999 120-3933-P 120-4243 Front Right Hand Caliper          1984-1999 120-3945-P 120-4242 Optional Mounting Bolt Kit, P/N: 230-4237 Click here for more information and to purchase GP 300 Rear Motorcycle Caliper: View Caliper Description (Bracket Not Included) Polished Chrome Rear Caliper 120-3935-P 120-4244 GP 300 Rear Bracket Description Black Softail® Bracket Kit   1984-1999 250-4235 Click here for more information and to purchase Motorcycle Brake Fluid: Harley Davidson® Motorcycles specifies use of DOT 5 Silicone brake fluid because of its minimized impact on painted surfaces. Wilwood disc brake calipers will work with either fluid, but never mix DOT 5 Silicone brake fluid with DOT 3 or 4 fluids. Changing brake fluid on a regular basis is highly recommended and esily accomplished when changing brake calipers. DOT 3 and DOT 4 brake fluids are superior for general brake system use as well as high performance applications. For best results, Wilwood Engineering recommends the use of Hi-Temp 570 DOT 3 brake fluid (P/N 290-0632) or EXP 600 Plus DOT 4 brake fluid (P/N 290-6209).