I thought we had a thread like this but I don't remember where it was or where it went so I'm starting a new one.
This is a thread to list all of the useless mods that are sold by vendors/eBay. List the worthless items and reasons why they are worthless and link to proof if available.
THIS THREAD IS FOR CAR STUFF NOT FORUM MODS.
1. eBay chips - Do nothing at all https://www.youtube.com/watch?v=VGtImIP6j3A
2. Throttle body spacer - Does not do anything (unless you are taping it for nitrous or water/meth injection.) Might cause coolant leak. http://www.gpona.com/forums/supercha...er-t21942.html
3. Throttle body heat shield. - Doesn't do anything http://www.gpona.com/forums/04-08-gr...ld-t23790.html
4. ZZP Race Pellet. - PCM must be tuned to use it, happy knob can be made for less, but still needs to be tuned for. http://www.grandprixforums.net/threa...amp-Happy-Knob
5. Cold Air Intakes(K&N, Wizaired, SLP, Ect) - Do not live up to any of the claims made by vendors. http://www.grandprixforums.net/threa...en-Cone-Intake https://www.youtube.com/watch?v=gCi2yo4UqPI
6. Cat-back exhaust - The factory cat-back is good to 350 whp so unless yours is rusted leave it alone.
7. U-bend delete - Not really a useless mod, but there are other mods that can be done to eliminate this problem that are better for the car such as a downpipe or headers.
8. Electric superchargers - Do not work https://www.youtube.com/watch?v=cbGWgvJN1_8
9. These things - Pretty much useless fall under same category as the Electric superchargers.