Armytrix BMW F20/F21 M135i (2012-2015) valvetronic exhaust system

Experience the raw performance and unmistakable sound of your BMW F20/F21 M135i like never before with the ARMYTRIX Valvetronic Exhaust System. Engineered specifically for the 2012–2015 RWD models equipped with the N55B30 turbocharged inline-six, this system delivers aggressive acoustics, improved flow, and wireless valve control for maximum versatility.

Whether you're carving corners or cruising through town, ARMYTRIX transforms your M135i into a more dynamic, visceral driving machine—without sacrificing day-to-day comfort or reliability.

Fitment:

• Model: BMW M135i

• Chassis: F20 / F21

• Years: 2012–2015

• Engine: N55B30 3.0L Turbocharged Inline-6

• Drive Type: Rear-Wheel Drive (RWD Only)

• Body Styles: 5-Door Hatchback / 3-Door Hatchback

• Drive Orientation: Left-Hand Drive & Right-Hand Drive Compatible

• VIN Verification: Strongly recommended to confirm downpipe version and precise fitment

• Note: Tailpipe adjustment may be required depending on rear bumper style; quad-tip configuration requires compatible aftermarket diffuser (contact us before ordering)

Key Features:

• Wireless Valvetronic Control: App-based operation via OBDII port—switch between stealth and sport with a tap

• Main Pipe Diameter: 3.0” – optimised for power and turbo spool

• Exhaust Tips: Dual 2.5” – available in polished or black finishes

• Direct Bolt-On Installation: No cutting or welding required; all hardware included

• Smart CEL Prevention: Exclusive Armytrix fault code clearing module greatly reduces the chance of Check Engine Light (CEL) when paired with high-flow or decat setups

• Premium Construction: Crafted from high-grade stainless steel for superior durability, heat resistance, and long-term performance

• Plug-and-Play Design: OBDII control module slashes install time by 30% compared to traditional wired systems

Valvetronic Sound Modes:

Take command of your M135i’s exhaust character with adjustable valve control via the Armytrix app or included wireless remote:

• Valves Closed: Refined and quiet for daily driving or early morning starts

• Valves Open: Loud, aggressive tone for spirited driving and full performance experience

• Adaptive Control: System responds to RPM and throttle input for dynamic sound modulation

CEL Prevention & System Integration:

Included with the full system is a dedicated Armytrix OBDII module that:

• Clears fault codes related to catalytic converter or OPF deletion

• Minimises the likelihood of a CEL, even with high-flow or catless downpipes

• Seamlessly integrates with vehicle electronics for a hassle-free experience

Why Choose ARMYTRIX for Your BMW M135i?

• Fully wireless valve control via smartphone and OBDII connection

• Proven performance gains with signature ARMYTRIX sound

• Enhanced aesthetics with dual 2.5” tips and optional quad-tip configuration

• Engineered specifically for RWD F20/F21 M135i models

• CEL-reducing technology for smoother operation with modified exhaust setups

Give Your M135i the Sound, Style, and Performance It Deserves

Perfectly tailored for the N55-powered F20/F21 chassis, the ARMYTRIX Valvetronic Exhaust System elevates your M135i to new heights. From the aggressive sound profile to the intelligent valve control and premium craftsmanship, this system redefines what your BMW hatchback is capable of.