Originally Posted by jdemetry
OP's talking about passing SMOG tests and everyone is recommending getting rid of his cats. What am I missing?
No kidding people.
Without going with a catless set up, best bang for buck is R&P (higher numerical gearing) and a tune. Only a modest power increase with the tune, but the gearing change will allow for quicker acceleration in every gear. Coupled together (gearing + tune), you will feel a significant "seat of your pants" improvement.