To improve your 997.2 (2009-2011) Porsche's performance it will require more powerful, efficient combustion. In other words, you want to make your 997.2 (2009-2011) Porsche go faster. However, more fuel alone going into the engine wouldn’t work. The reason being is due to the fuel’s relationship between the oxygen in the air and the fuel required for the combustion. The relationship between the two is not strong enough. Instead, modifying your car’s engine to accept more air and fuel is the key. Modify your 997.2 (2009-2011) Porsche's engine with the items below. Be aware that some of the modifications may void your car’s warranty.