Ford Focus ST 225 (Mk2) Front Pipe Performance Exhaust Model_WRX STI 2.5 Saloon (2010-13) the main objective was to

the main objective was to eliminate the nasty drone at motorway speeds

The map designed for 93 octane is the most aggressive

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Your 91 octane results may be higher than listed above

Ford Focus ST 225 (Mk2) Front Pipe Performance Exhaust Model_WRX STI 2.5 Saloon (2010-13) the main objective was toCobra Sport performance exhausts enhance the sound, looks and quality of your vehicle giving you the ultimate driving experience. Our sports exhausts range is fully guaranteed to give you assurance of our quality. This Focus ST performance exhaust is made in 3" 76. 2mm bore pipework and fits from the turbo to the catalyst section. This de cat exhaust issold for motorsport and off road use only worldwide. All relevant fittings and gaskets are supplied.