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Message: <blockquote data-quote="Thomas_W" data-source="post: 132524" data-attributes="member: 9106">they dont come with 42# injectors in the 96-98 cars.We have a return style fuel system so they put a FMU (fuel management unit) in. This ups the fuel pressure X times to push more fuel thru the stock injectors thereby eliminating the need for larger injectors and theoretically a tune.BUT the issue with this is, you can burst the discs and lose the higher pressure causing a lean condition and engine breakage. And its not as accurate as larger injectors and a custom tune.SOOO..  this is why you should get rid of the FMU and replace it with a 255LPH hi pressure intank pump (which should be done anyways) and a custom dyno tune.</blockquote>