lmao i just used a knife, sat down turn on the tv and twirled a knife in circles for hours untill i had a perfect circle for the sensor, dont need tools just need some sharp objects lols.
if you want to make it even easier on your self just cut the accordian tubing off, then all you need is some tubing and a filter.
not hard at all, save that $200 for mods that willl acutaully give you power, like headers or sometin.