Ah right, So around $750 for a 4'' intake or $130 for a replacement pipe.. im assuming with a tune and a few mods you would get a bit of extra power out of the intake but not so much the replacement pipe. If there was no sound difference would the 4'' intake be worth the extra $600? If you use the replacement pipe, I guess you would get a growler induction or something? and end up at the same price.. I want louder flutter/dose noises but dont want to waste money obviously suggestions/comments?