I own a B16 with a bunch of bolt ons. I will be doing more to the engine, Nitrous and head work. But those are future six months maybe a year projects. So basically this is a stock engine I just want to get the best performace out of my car and use controllers to help the engine from getting messed up. I am looking at a AFC NEO fuel controller and a 2 Step Rev Limiter. What are the advantages to both, and what are the down sides of them and are they worth the money two step is about $160 plus installing it and AFC NEO is $370. Any help would be great I know what 2 step controller does and what the AFC NEO does. Thanks in advance for your advice.