Review on UPGRADE Injectors 4 8 5 3 6 6 2L 217 1621 12580681 by Patrick Lets

I bought a set of these injectors and fitted them to my 4.8 liter truck which was taking longer than usual to start. A few months later I returned to the shop and they diagnosed multiple leaking injectors. The seller supplied a different set as I expected, they were pressure tested guess what they couldn't stick right out of the box. I had to buy a set of genuine GM injectors to get my truck to start and run properly. I asked for a refund and would return all 16 injectors. Never got a reply from the seller. Save your money and buy real GM injectors instead of those Chinese fakes so you don't ruin your engine.