Like you, the cost was getting pretty high so I stayed with stock injectors and regret it. Although I picked up 50HP, the cost to change the injectors while the engine was out would have been much less than now and I would not have to pay for a second JWT tune. Call JWT and speak with them, they were very helpful. I had to hold my boost to 10psi as the 500's blow 40% more air and any more boost would have been too high. They can help you with the turbos that you are looking at.