We found this unique 2003 Subaru WRX on LS1Tech. The factory Subaru flat-four was swapped for a 6.0 L LQ4 V8. It features an iron block, Magic Stick 4 camshaft, upgraded valve springs and retainers, Fast intake manifold, 93 mm throttle body, and LS2 oil pan. Behind the V8 is a T56 six-speed manual transmission, Driveshaft Shop driveshaft, and Nissan R33 Skyline rear end with Driveshaft Shop axles. The car rides on JIC Magic coilovers, adjustable rear sway bar, traction bars, and a set of Rota wheels.
Source: LS1Tech