* Vehicle: The make, model, and year of the vehicle greatly influence the results. A system designed for a naturally aspirated engine will yield different results than one for a turbocharged or supercharged engine. The existing exhaust system's design also matters.
* Specific Borla System: Borla offers different exhaust systems (Atak, S-Type, Pro XS, etc.) with varying levels of restriction and design. Each will have a different impact on performance.
* Engine Modifications: Other modifications to the engine (intake, tuning, etc.) will significantly influence the results. A Borla exhaust on a heavily modified engine might show a larger gain than on a stock engine.
* Testing Methodology: Dyno results can vary depending on the dyno used, ambient conditions, and the skill of the person conducting the test.
While Borla often advertises performance gains on their product pages, these are usually estimates based on testing done under specific conditions. These figures should be considered approximate. Don't expect a specific number without looking at dyno results for your exact vehicle and Borla exhaust system.
In short, you need to find dyno charts or real-world testing specifically for your vehicle and the exact Borla exhaust system you're considering to get an idea of the potential horsepower gain. Generally, expect gains in the range of a few to several horsepower, but it's not guaranteed and can even be negative in some cases.
