Meet The Crew

Charles Siritho

Owner / Operator

Meet Charles Siritho: The Enthusiastic Innovator Behind Function Factory Performance

Every successful business has a driving force behind it, and at Function Factory Performance, that force is Charles Siritho. As an industry trailblazer, Charles has made it his mission to leave an indelible mark on the automotive world. With FFP’s unparalleled customer service setting the gold standard, our dedication to the automotive community shows just how much we care about our loyal customers.

Our commitment to extensive research and development guarantees confidence in our products, whether they’re being tested on the streets or the racetrack. Charles and his talented crew members have revolutionized the aftermarket industry, excelling in digital marketing through educational videos and comprehensive instruction manuals that guide you every step of the way.

Since entering the industry at 18, Charles has been fueled by a passion for all things automotive. When he’s not steering Function Factory Performance towards success, you can find him drifting and tracking his 2016 Ford Mustang EcoBoost or taking passengers on thrilling rides in his 1989 Nissan 240sx to showcase drifting at its finest.

Did you know that Charles is quite the globetrotter? In 2019, he racked up over 170,000 air miles and explored amazing destinations, with Tokyo, Japan, topping the list. There, Charles enjoyed dining at the world’s best sushi restaurant and plans to return to drift the famed Ebisu circuit in the future.

If you ever have any questions or just want to chat about cars, feel free to reach out to Charles via email at or connect with him on social media below. He’s always eager to engage with fellow automotive enthusiasts and share his wealth of knowledge and experience!

Charles Siritho’s 2016 Ford Mustang Ecoboost Redline Edition

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Angela Keefe

Function Factory Performance Online Product Manager / Accountant

Angela Keefe, an East Coast native, grew up surrounded by a family of car enthusiasts, igniting her passion for the automotive world. Her journey in car ownership began with a 2015 EcoBoost Mustang. Not one to settle, she soon upgraded to a 2016 5.0 Mustang, only to raise her game further within six months to a 2020 Twin Turbo 5.0 Mustang, featuring Function Factory Performance’s Custom Twin Turbo Kit.

Angela’s fervor for cars, especially Mustangs, fuels her ongoing quest to expand her automotive knowledge. She relishes upgrading her vehicles to their maximum potential, backed by the support of numerous sponsors. Angela is dedicated to fostering meaningful partnerships within the automotive community, seeking to propel her growth and that of her peers in the industry.


Angela’s FFP Twin Turbo 2020 Ford Mustang GT

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