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Originally Posted by skittleslegend
Um...ok. I don't think you really caught what I was saying. You're looking at a fairly significant loss in top-end power swapping those intake manifolds. The K20Z3 was designed specifically for the RBC manifold. The torque gain you're looking at is neglible. It's a high-revving 2.0L Honda block...you're not going to see any significant change in torque output anyway. People dump the TSX manifold for the RBC during K-swaps.
But I suppose if you're really set on using the TSX IM, then go for it. It'll fit. You should still be able to use the Si's throttle body, but from what John at Hytech has said, the TSX TB will swap over too.
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I understand clearly what you are saying
I am merely curious to know if the IM would fit. I am not set on doing any type of swap, but would like to see what a dyno would show for an si with the RBB IM versus an si with the stock RBC.