just unclip top of airbox remove the bottom half of the box from the car and drill away apart from the side next to the engine and ONLY do the bottom half,u could fit some of the flexi ducting u can get into the hole at the front of the air box where the trumpet piece sits and direct the hose down towards the front bumper to get a direct cold air feed, wouldnt say there is a huge power gain probably a couple of bhp just found it slightly more responsive and a nice deep induction roar
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