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Prc heads

This is a discussion on Prc heads within the Internal Engine forums, part of the LSx Technical Help Section category; How can you tell the Texas Speed stage 2.5 5.3 and their stage 2.5 ls6 heads apart....

  1. #1
    Junior Member
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    silver
    2000 ss camaro

    Prc heads

    How can you tell the Texas Speed stage 2.5 5.3 and their stage 2.5 ls6 heads apart.

  2. #2
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    first clue will be the part numbers on the heads......ls6 heads are 243's and 5.3 heads are 852 or 706 I believe. Going off memory there on the 5.3 part numbers but I *think* that's right.

  3. #3
    Junior Member
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    silver
    2000 ss camaro

    Where the part numbers usually are cast in the head, there is either a "PRC" engraved, or "stage 2.5" engraved. I wonder if there is any other quick way.

  4. #4
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    silver
    2000 ss camaro

    I think I found my answer. The exhaust ports are "D" shaped, and the serial numbers inside the heads are 12564243.

  5. #5
    Member cowstandmoto's Avatar
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    Dark Blue Metallic
    2002 Trans Am WS6 M6

    I just looked at mine. I have the 5.3's. But because I am old and blind, I couldn't see what the numbers were.

  6. #6
    Senior Member INMY01TA's Avatar
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    Black
    2001 Trans Am (sold)

    Casting number and exhaist port.

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