I have a focus st170 i have made many mod's to improve its power and performance, a pipercross induction filter with a silcone hose air intake with replacing my standard hose, magnacor ignition leads, a scorpion stainless steel exhaust and bluefin install on tune 4, but is still not feeling a great lot of power mainly when pulling off from start up, as even noticing the struggle against old saxo's vtr's and standard civic type r's, could this be to something engine wise or electrical not functioning to how it should.. could anyone help or have experienced the same, as now been considering a scorpion sports cat and a manifold exhaust wrap as purchased denso iridum spark plugs for it now.