Performance upgrades Porsche 911 Turbo (996) Performance upgrade step I             Power: 335 kW (460 HP)   Torque: 660 Nm at 3.200 rpm   Details: [click to enlarge] ECU upgrade Sport airfilter N/max 7.000 rpm [click to enlarge] Performance upgrade step II             Power: 368 kW (500 HP)   Torque: 690 Nm   Details: [click to enlarge] ECU upgrade Sport airfilter Sport exhaust system with racing catalytic converters N/max 7.150 rpm Performance upgrade step III             Power: 397 kW (540 HP)   Torque: 720 Nm at 5.200 rpm   Details: [click to enlarge] ECU upgrade Sport airfilter 2 turbochargers K24 modified Sport exhaust system with racing catalytic converters Bosch silver spark plugs N/max 7.150 rpm [click to enlarge] Performance upgrade step IV             Power: 441 kW (600 HP)   Torque: 750 Nm at 4.400 rpm   Details: [click to enlarge] 2 turbochargers K24/K26 Turbo headers Sport exhaust system with racing catalytic converters Sport airfilter Free Flow intake system High performance intercooler High performance clutch 1.100 Nm Bosch silver spark plugs Modified fuel system ECU upgrade [click to enlarge] Performance upgrade step V             Power: 478 kW (650 HP)   Torque: 850 Nm at 4.400 rpm   Details: 2 Turbochargers Garret Ball-Bearing Turbo headers Sport exhaust system with racing catalytic converters Sport airfilter New airflow meter with calibration Free Flow intake system High performance intercooler High performance clutch 1.100 Nm Lightweight singlemass flywheel High-strength connecting rods Exhaust camshafts Bosch silver spark plugs Modified fuel system ECU upgrade [click to enlarge] Performance upgrade step VI             Power: 551 kW (750 HP)   Torque: 900 Nm at 5.800 rpm   Details: 2 Turbochargers Garret Ball-Bearing Turbo headers Sport exhaust system with racing catalytic converters Sport airfilter New airflow meter with calibration Free Flow intake system High performance intercooler High performance clutch 1.100 Nm Lightweight singlemass flywheel Modified fuel system Bosch silver spark plugs Carillo racing connecting rods Reinforced engine block (in exchange) Machined cylinderheads with bigger inlet and outlet valves (in exchange) Inlet camshafts Exhaust camshafts Fuel injectors with higher capacity Reinforced transmission (in exchange) ECU upgrade Sport exhaust system             Power: + 22 kW (30 HP) Details: [click to enlarge] 2 Stainless steel mufflers 2 Catalytic converters 100 cells 127 x 90 2 Tailpipe connections 1 Installation kit Download Movie Sport headers               stainless steel   Sport clutch up to 1.100 Nm               [click to enlarge] High performance disc Pressure plate and thrust bearing for street and racing use   Reinforced fuel pump system               [click to enlarge] Including installation kit Including 5 bar pressure regulator   Sport suspension               14-level adjustable rebound and compression damping stainless steel   6-piston brake system               [click to enlarge] 355mm brake discs Incl. racing brake pads Wheel mount with bearing and wheel hub (in exchange)