• Stage 1 (approx. 300 HP) Completely rebuilding the engine with polished inlet and outlet channels, modifying the intake air duct, special air-mass gauge from the field of motor sports, optimizing the ignition maps in the engine controller, modifying the exhaust pipe and optimizing the engine sound.
  • Stage 2 (approx. 370 HP) Completely rebuilding the engine with larger pistons and cylinders (3.8-liter capacity) Cylinder heads from the 964 RSR with larger inlet and outlet valves, modified camshafts and valve timing, rebuilding the injection system as individual throttle valve injection (modifying the entire engine controls), twin-pipe exhaust system and fan-type exhaust pipes.