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Thread: 74 F250 Highboy Header back suggestion.

  1. #1

    Default 74 F250 Highboy Header back suggestion.

    Hi there. I recently purchased these headers and was wondering what Flowtech header back exhaust kit would be most appropriate and add the best performance:

    Also, the instructions say the email me header to head flange should be cut 3/4 of the way through for shipping, and to complete that cut before installing to allow the header to be easily installed around the engine mount. I don’t see that these headers have been precut. Do I just pick a point in the middle and cut them? Any concern with cutting through the ceramic coating. Thanks for any and all advice!

  2. #2
    Join Date
    Dec 2009


    Contact Holley/Flowtech Tech Service (LINK).
    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

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