Typically, you can expect to gain anywhere from 5 to 15 horsepower with a basic intake header and exhaust upgrade. However, with more extensive modifications, such as porting and polishing the intake headers, upgrading the exhaust manifold and catalytic converter, and adding a performance air intake system, you could potentially gain as much as 30 horsepower or more.
It's important to note that not all intake headers and exhaust upgrades are created equally. Some are designed for specific vehicles and engines, while others are more universal. Additionally, the quality of the components and the installation workmanship can have a significant impact on the final results.
If you're considering an intake header and exhaust upgrade, be sure to do your research and choose reputable components that are compatible with your vehicle. It's also a good idea to have the work done by a qualified mechanic who has experience with performance modifications.
