just done 150 with loads left to halfway....lets see what i get ner ner its already got a panel filter, will mull over the drilled airbox idea....tbh id be spending more on v-power and the redex which i can easily offset by using cheaper fuel and driving better....i cant see the v-power giving me any noticeable extra miles, unless someone has real life proof to say otherwise? 200+ to the halfway mark seems a rarity.....you turbo guys should be getting better numbers if driven carefully