STOCK BLOW-OFF VALVES LIKE THOSE THAT COME STANDARD WITH THE FIESTA ST OFTEN suffer from a range of problems. They are plastic, and they leak, and if you want to up the power, they have trouble holding the extra boost. For those who want extra zip from their EcoBoost engine, Turbosmart designed the Fiesta ST Kompact Shortie Blow-off Valve (p/n TS-0203-1066). The aircraft grade aluminum alloy construction means cracking and leaking even under increased boost levels will never be an issue. The Fiesta ST Shortie gives razor sharp valve response, and a serious increase in performance over stock valves. The Shortie’s Dual Port design provides one plumb back port to keep the car’s computer happy, and two vent to atmosphere ports for that trademark Turbosmart Blow-off Valve sound we all know and love. The Fiesta ST Shortie includes all the necessary fittings and hardware to replace the standard bypass valve. MSRP is $346.95.