6.0L based Arias as cast fully assembled heads, Manley 2.25 x 1.60 stainless steel valves, PAC valve springs, matching as cast Arias intake manifold, custom solid roller camshaft, Arias forged piston with 10:8 compression, 4340 forged rotating assembly, 1.85 intake and 1.75 exhaust ratio shaft mount rockers, Demon 850 carburetor, GM aluminum oil pan, aluminum water pump, 4150 carb. adapter plate, ATI balancer, 575hp @ 6700 rpm and 550tq @ 4800 rpm, all parts are new, all Arias/Avenger components are made in the USA, 18000.00