Jamar's complete disc brake kits include everything for both sides of the vehicle that you'll need, EXCEPT adapter fittings for whatever type of brake line you plan to use and lug nuts. The adapter fittings are listed below.This kit is specifically designed for long axle swing axle's (2-1/2" long splines) or IRS stub axles.What's Included:Two 5 Lug VW Pattern (5 on 205mm) RotorsChromoly Center HubsTwo 4 Piston Calipers With PadsTwo Caliper BracketsSpecs:Calipers are four piston with 1-5/8" diameter pistonsUses standard DOT 3, DOT 4 or DOT 5.1 brake fluid1/8" NPT pipe thread inlet (You'll need adapter fittings listed below)Rotors have 14mm-1.5 thread studs pressed into them (You'll need to purchase lug nuts)bug beetle baja transmission