Some of you may or may not know that I have a blog on the Cosworth USA site. I have to be politically correct since I am officially speaking as a representative of the company so it’s not as much fun, but the subject matter is probably interesting to some of you. Here on Beyond the Dyno I represent no company so I don’t really give a shit who I offend or give props to. Anyhow check it out and see why you shouldn’t drop in forged pistons in an EJ257 block. In most cases, production block bores are not oval so you should almost never drop in forged pistons without a proper bore/hone. I thought is pretty interesting that a factory block could be so damn oval. And before you talk shit about Subarus, your factory block is probably only slightly better.