This is my 04' Silverado Extcab 4x4 w/trailer package, 3.73's and the 23' V-nose United trailer w/1.5 ft extended tongue that moved us from MD to CO. Trailer weight was right at 10k using a 1000lb Reese weight distribution round bar hitch. Exhaust is a single in, dual out Flowmaster, Spectre intake assembly, Grantelli plug wires, E3 spark plugs, EBC cross drilled and slotted rotors, Hawk Performance ceramic pads, Airlift rear bags to keep it running level, Curtis trailer brake assembly to slow us down, Royal purple ICE in the coolant, Royal Purple engine oil and Royal Purple Tranny oil.