Mikuni HRS48 Race Carburetor Kit (48-2P) - 48mm - Polished 48-2PDesigned for the serious race engine builder and exteme street motor enthusiast looking for more power. Recommended for 120ci engines or bigger with high flow heads and cams. Kit include a 48mm smoothbore carb, rubber mounting flange (78mm bolt hole centers), choke cable, four main jets. Builder supplies manifold and appropriate air filter or velocity stack. Uses stock Harley CV type cables.