WELCOME TO FUNCTION FACTORY PERFORMANCE
Factory Proven. Factory Backed. — Premium performance parts & expert installation since 2017
FIND PARTS FOR YOUR VEHICLE
Select your year, make, and model to see compatible parts
CHOOSE YOUR PLATFORM
Premium performance parts for the world's most exciting vehicles
BEST SELLERS
Our most popular performance parts — proven by thousands of enthusiasts
FACTORY PROVEN. FACTORY BACKED.
Our crew of passionate car enthusiasts, led by owner and founder Charles Siritho, carefully hand-selects our premier products. We rigorously test performance parts on our Ford Mustangs, McLarens, and customer vehicles.
"We built FFP to be the shop we always wished existed — expert knowledge, premium parts, and no BS."
NEW ARRIVALS
Fresh drops — just landed in our warehouse
-
Corsa Oil Catch Can Kit – 2024-2026 Mustang GT Dark Horse S650 5.0L Coyote CC0021
$149.99Backorderd - Call or Email For ETA
-
Corsa Xtreme Cat-Back Exhaust – 2024-2026 Mustang GT Convertible S650 Non-Active 21275
$1,999.99Backorderd - Call or Email For ETA
-
Corsa Axle-Back Exhaust – 2024-2026 Mustang GT Convertible S650 Straight Tips 21273
$1,499.99Contact Us for More Information
-
Corsa Axle-Back Exhaust – 2024-2026 Mustang GT Convertible S650 Slash Tips 21272
$1,499.99Contact Us for More Information
-
Corsa Xtreme Valved Cat-Back Exhaust – 2024-2026 Mustang GT Convertible S650 Slash Tips 21270
$1,849.99Contact Us for More Information
-
MBRP 2015-2023 Ford Mustang EcoBoost Black Series Cat-Back Exhaust Race Version
$739.99Backorderd - Call or Email For ETA
-
APR Performance 2015-2017 Ford Mustang GTC-200 Carbon Fiber Rear Wing
$1,463.99Backorderd - Call or Email For ETA
Certified Specialist
THORNEY MOTORSPORT OF LOS ANGELES
Factory-trained Thorney Motorsport independent specialist. Expert service, genuine parts, and performance upgrades for all McLaren models.
-
EOS 2020-2024 Chevrolet Corvette C8 Carbon Flash Side Skirts Rocker Panels
$299.98Contact Us for More Information
McLAREN EXTENDED WARRANTY COVERAGE
Protect your investment with comprehensive coverage from Thorney Motorsport — the UK's leading independent McLaren specialists.
FROM THE BLOG
Install Feature
FFP Reimagines the McLaren 750S: A NOVITEC Collaboration
Function Factory Performance transforms a McLaren 750S with NOVITEC upgrades.
FFP News
FFP Does Monterey Car Week 2025
Supercars, spectacle, and sleepless nights at the world's most prestigious event.
Guide
Ultimate Guide To Modifying Your EcoBoost Mustang
Everything you need to build the perfect EcoBoost Mustang.
Explore All Articles
Browse our complete collection of build features and guides.
LET'S TALK PERFORMANCE
Questions about parts? Need install advice? Our team of enthusiasts is here to help you build the perfect setup.
805-267-9762