It was KB, the 2V made more power with equal boost with the 2.2KB at like 18-20lbs of boost.DBMSTNG said:that may not always true. i believe it was Kenne Belle who discovered that a 2V with a blower, cams, and ported heads actually made more power than the same setup on a 4V with cams and ported heads. it had something to do with one big single exhaust valve being better in forced induction applications than 2 small exhaust valves. i wish i could find the article.