you have to get the code removed from your pcm, then u need to make or buy block off plates, i installed my block-off plates with copper rtv and anaerobic gasket maker and it worked well.
16' wrx sti- stock
06 Spice Red GTO- m6/exhaust/tune/suspension/377whp-383tq-sold
99 silvermist gp gt-g5/xp/IC/3.0mps-parted&sold