yeecup
ClioSport Club Member
mk8Fiesta ST,172 cup
http://www.ebay.co.uk/itm/Schrick-R...arts_Vehicles_CarParts_SM&hash=item41735838b8
do these run on standard ecu? Anyone know what sort of gains these give, and are they worth the extra cost over 421's or 438's?
do these run on standard ecu? Anyone know what sort of gains these give, and are they worth the extra cost over 421's or 438's?