Hi. I was wondering if you guys could tell me why the k20a2 is considered so much better then the k20a3. I've been trying to research both of these and it's hard to find good info over the internet. I can't see for myself why the a3 doesn't have the same potential as the a2. i ask mostly because i have an 05 civic si with the a3 in it and I would rather not swap it at all. I mean i'm not looking for ungodly amounts of horsepower. it just seems to me that i could still be happy with it with the typical things such as rebuild, turbo, and aftermarket anything i can get my hands on. Tell me whatever you guys can about the two and please provide substantial evidence when you can. Thanks.