2021 BMW M440i Base Performance Parts

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...

G2X BMW M340i/M440i Mid-Pipe 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 develop...

Custom built multi-function digital boost gauge and more for the G20, G21, G22, G23, G26, G42, G80, and G82 generation (2019-2024) BMW 2 Series, 3 Series, and 4 Series, including 218i, 220i, M240i, 318i, 320i, 330i, M340i, M3, 420i, 430i, M440i, and M4 models....

Exhaust Downpipe Midpipe

Exhaust Equal Length Midpipe

This bundle gives you our industry leading B58 AFlow catted downpipe and our M340i/M440i single midpipe at a special price.

Boost tap kit for BMW B48 / B58 engines. Includes approximately 60" of 5/32" O.D. plastic tubing, zip ties, and connector hoses. This kit does not include a gauge or sensor, sold separately.

BMW M340i / M440i Valved Exhaust System 3.5" Midpipe, Dual 3" Axle-Back, Pneumatic Valves Overview The Valvetronic Designs Valved Exhaust System for the BMW G2X M340i and M440i is the ultimate upgrade for drivers who demand flexibility, performance, and an unforgettable exhaust note. Built...

BMW B58 (Gen 1 / Gen 2 / Gen 3) – EPA-Compliant 400 Cell Catted Downpipes Engineered for the B58 Turbocharged Inline-6 • High-Flow • Compliant • Introducing Our NEW 400 Cell EPA-Compliant Downpipes for the B58 Platform Across every generation, the B58 turbocharged...

Upgrade from the stock B58 downpipe to the MAD B58 catted downpipe for maximum airflow, power, and sound! Introducing the Mad Catted B58 Downpipe, the perfect upgrade for BMW enthusiasts looking to enhance their vehicle's performance and exhaust sound. Crafted from premium quality 304...

Upgrade your turbocharged BMW or Toyota Supra with the MAD B58 Gen 2 Charge Pipe, engineered to improve airflow, durability, and throttle response while eliminating the weak factory plastic charge pipe prone to cracking under boost. Designed as a direct OEM replacement, this performance...

Enhance your vehicle's exhaust system with the MAD Valve Controller, the ultimate tool for customizing your exhaust sound and performance. Designed to override factory settings, this controller gives you complete control over your exhaust flap, allowing you to tailor the exhaust note to match...

Upgrade from the stock B58 downpipe to the MAD B58 catless downpipe for maximum airflow, power, and sound! The Mad Catless B58 Downpipe is an essential upgrade for any BMW enthusiast looking to maximize the performance of their B58 engine. Made from high-quality materials,...