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then you will need to select the OTP ECU tuning option
In Street configuration expect a significant increase in exhaust volume with a smooth flat six sound and more turbo spool sounds
Dramatically increase power and sound of your 360 Challenge Stradale by replacing the heavy factory muffler and restrictive secondary catalytic converters with a high performance X-pipe exhaust
GT4 Porsche sports car ONLY and I MEAN ONLY the Fabspeed TRUE X pipes adds significant exhaust flow
Improved sports car sound and throttle response throughout the RPM range
Fabspeed Ferrari 328 Sport Catalytic Converters (1986-1989) hood emblem then you will need toHP (whp): +10 TQ (ft lbs): +7 High performance bolt on replacement for the heavy and restrictive OEM catalytic converters; increases power, sound, and throttle response. SOUND: Give your 348 a moderate increase in volume and tone. These Sport Cats will also give you a more high pitched motorsport sound from the Ferrari engine. This is all without any interior drone. POWER: On our dyno we saw max power gains of 10 whp (wheel horsepower) and 7 ft lbs of
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