Hello all, my kid races a stock 2002 cavalier 2.2 ecotec and i am searching for a few more horsepower, car must remain “stock” except cold air intake allowed which i have on, being from old school we have more air now need more fuel? Current stock pump is delivering 52# fuel pressure and was thinking of hiding a fuel pump along with regulator to raise pressure and leave stock injectors in or would you increase injector size? Not looking to do top end as far as cam, rockers etc, just looking for a slight edge. Any input would be gateful and apologise if this had been asked before.