The air intake system is one of the most common and least expensive performance modifications our customers make. Increasing air-flow leads to quicker turbo spool-up, improved fuel mileage and overall horsepower increases. Fuel economy increase can vary depending on driving habits and conditions. Much like an exhaust & programmer you could see up to a 5%-10% increase. The S&B system does not offer HP & TQ ratings, but they do indicate that the flows 47.8% better than the stock intake.