I am considering making a 4TB intake manifold for the miata since I have to make a Intake manifold for the new motor anyway. What are any of the Drawbacks of 4TB on a Turbo car. How much power would a SR20DET pickup by just bolting on the intake manifold vs the high port/low port manifold..

My friend (RacerX with NX2K BB motor) said GTiR's make a good bit more mid range and top end than similarly setup SR20DET's..

Does anyone know where I could pickup one of thes intake manifolds from? I need it from the TB back to the airbox around the horns... I will take the whole manifold if need be...

Thanks.

Danny