If you've got the cash for a K20 then I would say build your engine up some. Your rex is very fast and it's not going to be quicker with an N/A K20A. If you plan on turbo K20 though, then definitely go K. 8)
Well thats a tall order.
They're really two different things.
If your serious about auto-x you better study the rule book b/c how you modify the car will dictate what class your in. And in turn will dictate what your competition will be and whether you have a fighting chance.
Gearing, suspension, and power curve are all subject to application.
You better have deep pockets too :lol:
IF you are staying turbo I don't see the point. I mean it is just as easy to make the same power with a sleaved B with boost that you can with a K with boost. NA K is king, but with positive manifold pressure thrown into the game, B is just fine. It would be allot easier to sleave your block, change compressors, adn injectors, and retune. The K swap seems like allot of extra work to me. Just my .02 :wink: