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05-16-2024, 11:28 PM | #7 |
Senior Member
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,829
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Re: 1995-2007 Vortec intake manifolds
The poppet valves can't be tuned. I understand later model L31 Vortecs used an updated spider that had true multipoint injectors. I don't know if they're still available.
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