you wont need a re-map mate but the best plugs are the
jcw spec nkg's they cost but there quite hardy i get mine from here
Sparkplugs UK NGK Champion Denso Sparkplug, Glowplug and Lambda Sensors type this code into the part finder BKR7EQUP and obviously you need 4 plugs the price on there is half what mini charge even me with a trade account