Same K20a2 in a new civic Si. I have a SCC Mag with a review on the "Top 10 Cars under 20K" and the Si came in dead last. The first modification it said to get was a RSX Tranny. Why didn't Honda just mass produce RSX trannys to put in the Si's? For now, it seems like the aftermarket for the USDM K20a2 seems a little dwindling now, but i sure hope they get some power pumping gear out soon. My favorite is still the B18C5 over the k20a even though it has -10 hp overall. May the Tuning Gods bestow a Giant Turbo kit for the K20a2.