Bigger injectors. IIRC you have subies, if you do they do not flow too good imo. I had a set of 440subies they maxxed out on e85 n/a whereas the oem 370 nissan stillhad quite a ways to go on the same setup. The 525 dont flow well either, they have maxxed out at about 330whp here. Get some nice 800cc injectors minimum. Or you can stock up transmissions. About the xcessive plenum you will need to go with a bigger throttle body than 70mm on boost. All motor cars run bigger than 70mm and have good gains.