I just found aout about thes Helix Throttle body spaceers and I need to know before I buy one. First off I need to know if it will fit on my 5.4L with a 75mm throttle body? Are they worth it? Do they work? Does anybody ahve one that can fill me in on this product?

 

i dont know if it did anything to mine (its on a 4.2L). but they do make a high pitched whistling sound sort of turboish sounding. i dont know if they make one for bigger throttle bodies but they prolly do if you check with them