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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.
    '92 Ford Mustang GT: Dominator MPFI & DIS, A/C, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/X-pipe/shorty headers, 100HP progressive dry direct-port NOS, 160A 3G alternator, Optima Red battery, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 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?

    Attachment 2852

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