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Thread: 4BBL TBI rebuild kit?

  1. #1
    Join Date
    May 2015
    Location
    Adrian, MI
    Posts
    10

    Default 4BBL TBI rebuild kit?

    I've searched through Holley's website, can't seem to find a TBI rebuild/renew kit that's for the Commander 950/Avenger systems. Only the old Pro-Jection.
    https://www.holley.com/products/fuel...ts/parts/503-6

    The correct injector o-rings:
    https://www.holley.com/products/fuel...s/parts/508-19

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    19,283

    Default

    The Pro-Jection TBI unit is the same, except for the newer Delphi TBI fuel injectors (if you don't have the older B2 injectors). So it looks like you've found the kits you need.
    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

  3. #3
    Join Date
    May 2015
    Location
    Adrian, MI
    Posts
    10

    Default

    Here's what I got back from Holley. I asked before making this post.

    503-6 was added with both style injector o-rings. 503-6 will have the correct o-rings. If you just need the o-rings, then 508-19 will do the job. Old picture will not show new style injectors.
    Sincerely, Woody
    Holley EFI Support

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