Keep in mind, different turbos make different power at different boost levels according to VE. You want to start by selecting the right turbo for your motor/goals/power potential/cost. The most you can get away with [reliably] on the stock SOHC bottom end is around 175-200hp depending on the TUNER and fuel setup. List what goals you're motivated to achieve (ET and/or Power) and we can help you choose the right turbo. From there you choose everything else.