Turbo III title refers to the DOHC 16-valve intercooled engine. It was based on the 1990 Turbo IV(vnt csx) but featured a new head, intake and exhaust manifolds, and pistons--all designed by Lotus. , the twin camshafts lie alongside the valves and actuate them via roller rocker arms. The combustion chambers had a pent-roof design with 8.5:1 compression ratio. Like in the other Chrysler turbo motors, this one featured pistons that have valve reliefs to prevent valve damage if the timing belt fails. A Garrett TB03 turbo is installed and set for 11 psi of boost. Balance shafts carry over from the factory Turbo IV, as did the intercooler. Redline was set at 6500. Power figures were healthy: 224 HP at 6000 rpm and 217 ft-lb at 2800 rpm.