How much hp will you gain with an intake an headers?

The horsepower gain from installing an aftermarket intake and headers can vary significantly based on the vehicle and the specific parts used. On average, you might expect an increase of 10 to 30 horsepower when combining these modifications. However, the actual gain will depend on factors such as engine size, tuning, and overall vehicle condition. It's essential to ensure that these modifications are complemented by proper tuning for optimal performance.