I see these all over eBay and some actually show -12 index. They are so cheap some say remanufactured index 9? How do they even do that or is it a crock of shit? I was looking into upgrading my index 8 and 5 injectors that were done in 2011 but it's hard to bite the 1500 for just injectors on a msrp 7999 car. Let alone installing them myself and coding them. Anyone try these things?