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Thread: Intake Manifolds

  1. #11
    Join Date
    Dec 2009


    The same amount that Edelbrock does on certain models.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  2. #12


    I'm running an Edelbrock Performer RPM Air-Gap on my 455. Because of the possible issues I had read about, I went ahead & installed a 1" open spacer. The Sniper setup runs like a champ, and this intake makes a ton more low end than the old Offy Supersonic single-plane it replaced.

  3. #13


    Sounds like spacers can be helpful. As long as there is hood clearance there are several options.

    My car will likely have limited clearance with an Air-Gap. I read on another thread that even a 1/4" phenolic 4 hole spacer may cure the whistle. Would a 1/4" spacer like the one in the photo be OK to use on a dual-plane manifold that has the milled divider or even on an open single-plane manifold?

    Click image for larger version. 

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