1990 Porsche 928S4 928 S4 Turbo

Please scroll down to full-size pictures. 1990 Porsche 928 S4, gorgeous black on black, approx. 3,000 miles on modified ATS Racing turbocharger kit with a Comp turbocharger as well as a 44mm wastegate, a water-to-air intercooler, revised engine management software, high-capacity fuel injectors, a fabricated stainless-steel exhaust system, coilover suspension, 18 inch 996 Turbo-specification alloy wheels, a Kenwood CD stereo, and a JL Audio sound system, powered by a 5.