0victory0

iTrader: (4)

hi i have a '00' MY impreza uk spec, got a hks panel filter and a ninja 2 back box and a H&S centre section on it. After fitting the new centre secton at times there seems as if the car holds back for a split second around 4k revs which didnt use to happen, has anyone else had this or got any ideas? could it be a coeincidence and the spark plugs beginning to break down or some new ht leads? Or could it be just in need or remapping?
cheers
craig

0victory0

iTrader: (4)

bump