Tomei RB28 kit will be able to handle 400rwkw no problem. Its the head that makes the power afterall. Putting in a stroker kit won't instantly make you 400rwkw. Turbo selection, cams, machining of the head and tuning etc will be where you get your power. Fineline has a worked 25 thats making a shedload of power while remaining stock capacity. Its responsive aswell but there a lot of work gone into the head.