The IWG (on the EFR at least) need a fair a mount of pre-load & pretty much everyone uses the stiff canisters or does an upgraded duel port from Turbosmart. The Waste Gate door being at a 45* to the flow, instead of parallel gives it far better priority that is lacking in the prior turbine housing & something that is a better feature on external WG setups. Both the EFR & G25 has this updated & improved feature. I personally prefer External WG. They take more time to build the manifold, but the turbo fits better in the chassis as well.
