Originally Posted by Ferocity02

Unfortunately, there is very little you can do that is legal. Nitrous kits are not legal, unless they have a CARB number on them. The only CARB legal FI kits that I know of are the STS turbo and the Procharger P1SC. However, most FI kits require an upgrade of the fuel system, which again is not legal, unless CARB certified(never seen one). Tuning is also not legal, again unless CARB certified. You can do a forged bottom end or a stroker. They may not be legal but the smog people have no way of knowing what's inside the engine. All of the laws do limit an LS1's horsepower in CA, and I'd say it's around 450rwhp when COMPLETELY CARB legal.