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What is the diff.

This is a discussion on What is the diff. within the Internal Engine forums, part of the LSx Technical Help Section category; I have a set of heads off my 99TA. The casting is 853. What is the difference in these and ...

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    Junior Member 1 TRANS AM's Avatar
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    What is the diff.

    I have a set of heads off my 99TA. The casting is 853. What is the difference in these and the 241s?

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    Junior Member 1 TRANS AM's Avatar
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    32 views and NO ONE KNOWS.

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    M6 King Hot Black Trans-Am's Avatar
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    The 853 doesn't flow as well as the 241. The 241's were on 01 & 02's.

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    down with the lot lizards blackhawk01's Avatar
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    2001 Camaro SS A4

    806 - 98 heads (perimeter head bolt pattern)
    853 - 99-00 heads (newer center bolt valve cover design)
    241 - 01-02 heads ("")

    243 - Z06 heads

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    ROWDY BURNS jsteele90's Avatar
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    383/372 CMS tuned
    2000 z28

    my 2000 came with 241 heads. it has 243s now!!!!1

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    Member c5z28's Avatar
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    my highbeams

    different casting 241's should be slightly smoother, not enough for a head swap though.

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    cutting and welding mark21742's Avatar
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    Quote Originally Posted by blackhawk01 View Post
    806 - 98 heads (perimeter head bolt pattern)
    853 - 99-00 heads (newer center bolt valve cover design)
    241 - 01-02 heads ("")

    243 - Z06 heads
    04 goats have the 241's also

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    cutting and welding mark21742's Avatar
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    hugger orange
    2004

    any chance of getting a sticky on oem heads, specs, advantages/disadvantages, and posibilities of porting?
    I don't know if its too much to ask of the mods, but I know it would really help a lot of us out.
    I've learned more than I ever thought I could here on the site, you all do a great job!

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    Senior Member SS02's Avatar
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    A good kiss @ss will not hurt...
    Cool dude! Jjust Jokin Ur are right, much info here!!!!!!!!!!!!!!!

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    cutting and welding mark21742's Avatar
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    hugger orange
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    Quote Originally Posted by SS 2002 533HP View Post
    A good kiss @ss will not hurt...
    Cool dude! Jjust Jokin Ur are right, much info here!!!!!!!!!!!!!!!
    lol so true

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