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#20824
Casey Lynn
Participant

    US Member

    In general the gravity fed needle and seats have the larger I.D. over the pump fed assembly. Dan’s exception is also a valid one.
    For drag racing we always bought the 3HP needle and seat assembly for our V8s and V6s. It was the only one that had a remote chance of keeping up with the flow from (8) .096 high speed jets when the throttle went to "hang on".