The ' Type 997 ' 911 GT3 Cup racer is based on the 911 GT3 RS road car .
The ' Type 997 ' 911 GT3 Cup racer is is powered by a rear - mounted , 450 hp 3.8 - litre flat - six engine .
The ' Type 997 ' 911 GT3 Cup racer is based on the 911 GT3 RS road car , and is powered by a rear - mounted , 450 hp 3.8 - litre flat - six engine .