k ..the reasoning behind the maf, cold air, and throttle body is that they all help improve airflow into the motor ..and more air = more power. the throttle body has a bigger butterfly allowing more air to pass, the way cold air works is that cold air is more compressed than hot air meaning you can fit more cold air in the same amount of space as you could hot so basically you are stuffing more air into the motor - the stock maf is ok but if you want to go bigger all you need it to be calibrated to is your 19lb injectors and whether you have a cold air intake or not. all of these are good to have but gears would be a much wiser investment if possible - headers would be a good investment as well because the stock manifolds suck
personally ive never had a chip ..i wouldnt call it junk but id call it a mod that comes later as you could purchase better ones first before you hit the chip
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