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cybernationRSX said:
what is the differance between the base rsx k20 and the civic si k20? all i know is the rsx has a dual stage intake manifold that produces 9 more lb-ft of torque at 1000rpm slower
Aside from the intake manifold, the base non-Type-S RSX engine is identical to the one found under the hood of the Civic Si.

Here's a pic of a Si engine VS a type s engine.

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