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head numbers ... confused

This is a discussion on head numbers ... confused within the Internal Engine forums, part of the LSx Technical Help Section category; the 99 ls1 is ---9908918252229855--- and ---853--- 98 ls1 has a date ---3/22/97--- and a ---306--- number above it and ...

  1. #1
    Junior Member 98_Ws6_scooter's Avatar
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    Red
    1998 Trans am A4 Ws7

    head numbers ... confused

    the 99 ls1 is ---9908918252229855--- and ---853---

    98 ls1 has a date ---3/22/97--- and a ---306--- number above it and this is located above the first cylinder from the front of the car on the driver side


    lil help guys thanks...

    how do i know what these heads are and they might be stock.....

  2. #2
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    853 heads came on the 99-00 f-bodies

    306 heads came on 97-98 corvettes and f-bodies.

  3. #3
    Junior Member 98_Ws6_scooter's Avatar
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    Red
    1998 Trans am A4 Ws7

    ok thanks

  4. #4
    Impounded
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    Red
    2000 Trans Am

    Mines a 2000 and i got 241 casting, im assuming because it was made in August

  5. #5
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    if it's 8/2000, it's supposed to be a 2001. look at the emissions sticker under the hood for the correct year.

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