Originally Posted by stangerang
also if he didn't change the lower intake its not going to feed the heads any more air....
Ding!!!! We have a winner. The stock lower flows less than the stock heads. Therefore, changing heads without upgrading the stock lower is not going to allow you any more airflow. In fact, it could hurt your HP. Since you'll be flowing the same amount of air through larger ports, the air velocity will be lower.
CHUM it is.