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Ls2 to ls1 intake manifold

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Old Feb 20, 2026 | 08:12 PM
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Default Ls2 to ls1 intake manifold

Currently taking an l33 out of my Miata and replacing it with an ls1. The l33 has an ls2 intake with a cable throttle body. While removing it, the chain broke the schrader valve off the end of the fuel rail. Upon inspecting the intake, I also noticed the previous owner tightened the bolts so tight that it deformed the plastic that the bolts go through, as well as the intake ports on the manifold. I don’t have the cash to buy another ls2 intake and I can’t find any used ones for a decent price. My question is, if I keep the stock ls1 intake manifold and just change out the throttle body to a cable instead of dbw, how much will I lose compared to the much larger ls2 intake


and will it be noticeable? I’m running long tube headers, tsp cam, and a tune.
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Old Feb 20, 2026 | 08:40 PM
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Probably lose 5 hp or so.
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