Wait for the injector upgrade as well. Since the dual Pop upgrade will require you to have the ECU upgraded then for $100. Then your going to need injectors too, and there's an upgrade in the ECU for that as well. Save time and money and do them both at the same time. Plus when you do both upgrades to the ECU at the same time, it's still only $100 and one shipment back and forth, vise two payments of $100 ( ea. time ea. upgrade ) and two shipments and car downtime.