2021 BMW M440i Base Performance Parts

ARP BMW E46/328I Rod Bolt Kit

ARP BMW B58 3.0L Main Stud Kit

ARP BMW 3.0L B58 12pt ARP2000 Head Stud Kit

Stop the Flex. Launch with Confidence. Soft bushings are the enemy of hard launches and drivetrain longevity. The factory BMW transfer case bushings - especially on the G8X and F9X platforms - are notoriously soft. That’s the last thing you want when you’re putting...

Take control of your driving experience with the Bluetooth-enabled Pedal 2 Metal Throttle Enhancer, expertly designed to eliminate the sluggish throttle response often found in modern drive-by-wire systems. By intercepting and remapping the electronic signals sent to your ECM (Electronic Control Module), Pedal 2...

What is this? While using E85 fuel, It's vital to know what the actual ethanol content is. This is for the enthusiast looking to maximize the performance and efficiency of their MHD powered car with E85 fuel. It supports DME FlexFuel Integration when using...

Already running a Precision Raceworks F-Series B58 Stage 3 or Stage 4 / 4.5 fuel pump? Convert it into a true stand-alone AFS™ without replacing the pump you already own. The Precision Raceworks F-Series (F3x/F2x) B58 AFS™ Upgrade Kit is the highest performing and...

F-Series (F3x/F2x) B58 Stand Alone AFS™ - DIY Kit For use with a stock OEM pump. The Precision Raceworks F-Series (F3x/F2x) B58 Stand Alone AFS™ DIY Kit is the highest performing and most stable low pressure fuel system on the market! Forget about how...

G2X BMW M340i/M440i Rear Exhaust At Active Autowerke, it's not ONLY about making as much power as possible but to maximize the enjoyment of the drive. For 40 years, power has been the end result of improved performance due to our relentless desire to...

G4X BMW M240i Rear Exhaust At Active Autowerke, it's not ONLY about making as much power as possible but to maximize the enjoyment of the drive. For over 40 years, power has been the end result of improved performance due to our relentless desire...

Active Introduces its G2X Brace for larger exhaust systems on your M340i or M440i car. Available January 2025 at an introductory price of $349 and will be included in our G2X M340i/M440i Midpipes. The Active Autowerke G2X Chassis Brace or M340i Brace replaces your...