Naturally aspirated.
At the bottom here:
http://www.cartechbooks.com/techtips/ca ... ular-port/
And more here: http://www.lsxtv.com/features/six-speed ... sx-camaro/
The car is a 2002 Camaro and race weight is 3,250 with driver, so definitely lightened up. But that's no tube frame 2,200 lb race car either. 8.69 @ 156, through a T56 even.