well i myself work at oreillys and every day i sell at least 2 and everybody i have sold one to has been very pleased with the outcome and i also have one on my 89 ford f-150 its the oem replacement kind but i just recently got the whole tub and kit for my 88 i cant wait to see what it does for me its suppose to give me an additional 15 horse power plus cut down on fuel millage