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Thread: LSA Silverado

  1. #21
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    Dec 2017
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    Quote Originally Posted by 1FastBrick View Post
    Go with the factory rectangle ports and ditch the spacers.

    Look on summit 12675872 are factory LSA heads $561.37 Each and there complete
    I was told the 6.0 6.2 heads won't work on my 5.3 due to the bore size. Is that true?

  2. #22
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by kirklanc View Post
    I was told the 6.0 6.2 heads won't work on my 5.3 due to the bore size. Is that true?
    They would bolt on to your block fine (reduces compression ratio a little), but your intake manifold will not bolt on (rectangle vs cathedral).

  3. #23
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    Quote Originally Posted by kirklanc View Post
    I was told the 6.0 6.2 heads won't work on my 5.3 due to the bore size. Is that true?
    I am not sure on the smaller bore of the 5.3L

    Quote Originally Posted by joecar View Post
    They would bolt on to your block fine (reduces compression ratio a little), but your intake manifold will not bolt on (rectangle vs cathedral).
    Joecar, He has an LSA blower with rectangle ports. The rectangle to cathedral adapter's cause a lean tip in issue due to fuel puddling that can not be resolved in the tuning.

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