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  1. #1

    Default Valve springs for GT40 heads & Summit "E" plus cam?

    Summit suggests a somewhat pricey trick flow spring kit for use with their E303 plus cam which I am considering. Seems like overkill to me for what I am planning to do. I have an '88 low mileage roller 302 and a set of GT40 heads for my '83 Mustang to replace the aging flat tappet motor installed in it. I heard about bee hive springs etc. but was wondering if anyone had a suggested source for springs. This will be a street car daily driver, T5, 373's, fairly stock machine. The lift is .540/.550 and I'll use 1.6 rockers.

  2. #2


    Alex’s Parts is who I used for my GT40 springs, then had a shop install them.

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    1984 LTD LX, 160k mile Explorer 5.0, Comp XE264HR-14 cam, Alex’s Parts springs on stock GT40 3 bar heads, Unported Explorer intake, 1 5/8 shorty headers, off-road H-Pipe, Spintech 9000 mufflers, Holley Terminator X Max, J-Mod 4R70W, Mustang 8.8 w/ 3.73s, Tubular front and rear control arms, front coilovers, Turbocoupe rear coil springs

  3. #3


    Thanks for the info! Just what I was looking for.

  4. #4
    FEP Power Member gmatt's Avatar
    Join Date
    Jul 2009
    Chicago, south subs


    Lunati also sells an affordable spring for GT40 heads. Good for up to .570" lift

    I got these and had them installed by the shop that rebuilt my heads. Haven't installed them on the car yet.
    Last edited by gmatt; 12-16-2022 at 08:22 PM.

  5. #5


    I used Alex's for my new springs on my " P " heads... worked great...

  6. #6
    FEP Power Member mcb82gt's Avatar
    Join Date
    Jan 2004
    Olathe, Kansas


    I think Alex kits are unavailble last time i checked, those are the ones i wanted as well. I wanted the stock cam ones.

    Now stang-less.

    88 Cougar 5.0

  7. #7
    FEP Power Member slow84lx's Avatar
    Join Date
    Apr 2006
    Dallas, TX


    I bought a set for my GT40P's from Alex's Parts a few years ago.

  8. #8


    Quote Originally Posted by mcb82gt View Post
    I think Alex kits are unavailble last time i checked, those are the ones i wanted as well. I wanted the stock cam ones.
    I had to email them and they worked with me ordering and " turning on" the website order form when the items were in stock when I ordered springs and some other items... Their packaging is by far the best I have ever seen......

  9. #9
    FEP Senior Member Realmongo's Avatar
    Join Date
    Sep 2005
    Western Mass


    I've had that Trick Flow spring set on my '87 engine for almost 20 years now, no complaints with it.
    2017 Convertible 6-Speed
    1984 GT 5.0 T-Roof
    1965 Coupe 4-Speed
    1964-1/2 Coupe C4-Auto
    MCA National Certified Judge 1964-1966 and 1979-1993

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