Main bracket and rear supports made out of 5/8 thick aluminum , avoiding any deflection, similar competitors don't even use rear supports. (adding more groove on pulley won't make a kit better). 160 Amp CS130 1-Wire Alternator (Chrome Plated). Sanden style 7176 AC Compressor. High Volume Aluminum Water Pump with gaskets (short reverse rotation).Billet Aluminum AC Adapter fitting. Billet Aluminum Water Pump Pulley. Billet Aluminum 5/8 Rear support Brackets. All hardware require to install and instructions.