Because the Barra 4.0 I6-T in the OZ Falcon XR6 produces more hp/tq than even the '05s 4.6 ---- 320hp and 325lb/ft
better engine, but Ford would never do it -- stupid choice by Ford in my opinion :nonono:
more feasible would be the n/a I6 (244hp/275 lb/ft) instead of the danged V6 but again...