Do I need to modify or add anything else when fitting a bored-out throttle body?

Our throttle bodies for V6 and V8 engines are a direct replacement for the factory unit, so no additional modifications are required. However, for MAF-tuned Commodores (such as the Ecotec and VS Series III Holden V8), we recommend fitting the bored-out throttle body in conjunction with a reprogrammed PCM/memcal, as the throttle body can slightly alter the transmission shift points.