you're half right, some aftermarket may produce the intake. I believe the one GM used was a hand fabed prototype and they have no plan to produce it.joe_villa said:if you think about it, almost every engine that ford, dodge, even the imports are multiport fuel injection. by that, i mean one injector per cylinder. the 4.3 vortec is the only engine left thats got the CSFI, one injector, six poppet nozzles. an aftermarket manufacturer has got to come up with someting.