AVO S2A00G41BBLUA Blue Induction Silicone Turbo Inlet (02-07 WRX/STI/FXT) AVO didn't leave anything uncovered when making this turbo kit AVO includes all the water/oil lines and fittings making this a true direct bolt on kit The reduced back pressure of the AVO exhaust system as a whole gets rid of the terrible dip in the torque curve, and the improved flow increases performance