Fabspeed Ferrari 328 Sport Catalytic Converters (1986-1989) SP04 The Supercup is significantly louder

The Supercup is significantly louder than our Maxflo Exhaust

making it ideal for maintaining balance and control on lightweight

Designed for the offroad and UTV market

With a high initial bite

Fabspeed Ferrari 328 Sport Catalytic Converters (1986-1989) SP04 The Supercup is significantly louderHigh 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 and 7 ft lbs of TQ. FEATURES: Fits all Ferrari 328 vehicles