ATK makes some very nice and very powerful crate engines. They also happen to make some equally nice aluminium cylinder heads that will give your current small block Chevy some added punch.

Cast, CNC-machined, and assembled in the USA, the ATK High Performance Cylinder Heads flow some impressive numbers. For example, with 210cc intake ports, they flow 293cfm on the intake side at .800in of valve lift, and 207cfm on the exhaust side at the same lift figure. That’s enough airflow to feed a small block pushing 600bhpnews_ATK

More information from ENDS.