Performance Packages

PSI Proformance Stage 1 Performance Package for 2015-2020 Ford Mustang Shelby GT350 There’s nothing quite like the 5.2L Voodoo V8 screaming past 8,000 RPM. Unlock even more sound and performance from your GT350 with PSI Proformance Stage 1 Performance Package—delivering increased horsepower, enhanced driving feedback,...

PSI Proformance Stage 2 Performance Package for 2015-2020 Ford Mustang Shelby GT350 There’s nothing quite like the 5.2L Voodoo V8 screaming past 8,000 RPM. Unlock even more sound and performance from your GT350 with PSI Proformance Stage 2 Performance Package—delivering increased horsepower, enhanced driving...

PSI Proformance 900X Stage 3 Performance Package for 2020-2023 Ford Mustang Shelby GT500 The 2020+ Shelby GT500 has already set the bar as the most capable production Mustang to date. However, at PSI Proformance, we understand that our customers are always looking for that...

PSI Proformance 850X Stage 2 Performance Package for 2020-2023 Ford Mustang Shelby GT500 The 2020+ Shelby GT500 has already set the bar as the most capable production Mustang to date. However, at PSI Proformance, we understand that our customers are always looking for that...

PSI Proformance 800X Stage 1 Performance Package for 2020-2023 Ford Mustang Shelby GT500 The 2020+ Shelby GT500 has already set the bar as the most capable production Mustang to date. However, at PSI Proformance, we understand that our customers are always looking for that...

PSI Proformance Stage 3 Performance Package for 2012-2015 Chevrolet Camaro ZL1 Take your ZL1 to the next level with our Stage 3 Performance Package—engineered for serious enthusiasts who demand race-proven power and precision. Designed specifically for 2012–2015 Camaro ZL1 models, this package delivers significant...

PSI Proformance Stage 2 Performance Package for 2012-2015 Chevrolet Camaro ZL1 Take your ZL1 to the next level with our Stage 2 Performance Package—engineered for serious enthusiasts who demand race-proven power and precision. Designed specifically for 2012–2015 Camaro ZL1 models, this package delivers significant...

PSI Proformance Stage 1 Performance Package for 2010-2015 Chevrolet Camaro SS  Unlock your Camaro’s true potential with PSI’s Performance Packages—engineered for 2010–2015 Camaro SS models. Whether you're starting with basic upgrades or building a fully track-prepped machine, our Stage packages deliver scalable performance gains tailored...

PSI Proformance Stage 2 Performance Package for the 2010-2015 Camaro SS  Unlock your Camaro’s true potential with PSI’s Performance Packages—engineered for 2010–2015 Camaro SS models. Whether you're starting with basic upgrades or building a fully track-prepped machine, our Stage packages deliver scalable performance gains...