I've been kicking around an idea for a different intake option for the my z31 because the stock plenum sucks pretty bad and i think it would be cool to do something unique and potentially very efficient. My plans are to build the engine as much as i can without putting a turbo on it (ported heads, bigger cams, oversized valves, stiffer springs, bigger injectors, etc.). This manifold is designed to bolt directly up to the lower intake manifold on the vg30. The runners all have the same amount of deflection to keep it as even as possible between cylinders. The throttle body design and the velocity stacks are just rough estimates on size and shape but its pretty close. Eventually when I do decide I want to turbo the car, I could simply swap out the trumpets for an intake plenum similar to that of an rb26dett. Any ideas on if this is worth trying to put together? If it will help or hurt performance? I've done some looking and haven't found any examples of this on a vg30e.