As Commodore Australian ls1 5.7 chev

I have a safe Commodore Australian ls1 5.7 (g8 buick) USA style car I'm wanting to get more horsepower and get into low 11 second quarter mile times and I'm wanting to get more horsepower from stock factory motor I'm hoping nitrous oxide plates or intake manifold that hide nitrous systems and run it on street and race on weekends.