You take the throttle body off the intake. You will notice how its cone shaped but rough going towards the butterfly. All you do is smooth it down and grind down the inner lip to whhere its almost sharp and buff it until smooth you can get different bits for your dremel to get realy smooth. If you REALLY want to go crazy drill a couple small wholes in the butterfly next to the edge but dont nick the tb itself. more air will get in faster from close to open position basicly any obstruction can be sanded down to get air in faster. If you need more info go on google and look up Porting throttlebody DIY on any vehical its the same idea just different throttle bodies. It works alot better on the old style aveos with the throttle cable but it will still work on the drive by wire aveos to. Hope this helps