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im pretty sure its the k20z3 motor in the new civic si's (09 civic si.) that's stock now i don't know modded it all depends.

I'd rather have the k20 type s out of the 05 rsx type s(that's just my opinion). but money wise. you can buy and build a nice GSR(b18c1) for the price of a STOCK k20. Unless money is no option, and you can afford it.

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12y ago
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Q: What is the fastest Honda motor for a civic?
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