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Exhaust› Exhaust Pipes, Systems and Components

Armytrix

3-Mode Valve System Cat-Back Exhaust

Name: 3-Mode Valve System Cat-Back Exhaust
Brand: Armytrix
SKU: BMF23-QS42M

$3,327.10

SKU: BMF23-QS42M

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$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Overview

The Armytrix Valvetronic Catback Exhaust System is constructed from stainless steel and features quad matte black tips. This system includes a Valvetronic Muffler with a 3-mode valve system to control exhaust sound and a remote control module for operation.

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The ARMYTRIX Valvetrix Exhaust System is engineered for a significant upgrade in both performance and auditory experience for compatible BMW M135i and M235i models from 2012-2015. The system boasts a 3-mode valve system, allowing the driver to seamlessly switch between a stealthy quiet mode and a more aggressive, attention-grabbing sound profile, all controllable via a smartphone app through the ARMYTRIX exclusive OBDII dongle. Key features include a 3-inch main pipe diameter and 2.5-inch tips, contributing to its performance gains of 17.1 HP and 24.8 Nm of torque, while also reducing weight by 1.3 kg. The system incorporates a catalytic converter and OPF fault code clearing mechanism to help mitigate check engine lights. Installation is designed as a direct bolt-on process, with a plug-n-play module that reduces installation time. The system is compatible with both Left-Hand Drive and Right-Hand Drive vehicles. It is important to note specific fitment considerations. For the M135i, adjustments to the tailpipe may be necessary depending on the rear bumper style. Additionally, the quad-tips are only compatible with specific brands of diffusers; consultation is recommended before purchase. An ARMYTRIX OBDII Control Module is required for operation. Two versions of down-pipes are available, and buyers should verify fitment using their VIN prior to purchase.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Armytrix
Part Number	BMF23-QS42M
Category	Exhaust

Videos

BMW F20 M135i w/ Armytrix Mobile app & Key Fob Valvetronic Exhaust

BMW M235i Armytrix Valvetronic Exhaust Installed and Tested!

BMW M235i Revs, Launch Control w/ ARMYTRIX Performance Exhaust

BMW F20 M235i w/ ARMYTRIX Performance Valvetronic Exhaust by Designo Auto House

BMW F22 M235i w/ Armytrix Straight-Pipe Valvetronic Exhaust - Revs & Driving Sounds

Loud Armytrix BMW M235i / M135i Valvetronic Exhaust on CK Motorsport TV

BMW M235i w/ Armytrix Performance Valvetronic exhaust - Aggressive Revs

BMW M135i // Armytrix Full Exhaust // Stage 2 JB4 Remap // 407hp 510ftlb!

BMW M235i with Armytrix Quad-tips Valvetronic Exhaust System - Revs

Dyno 2014 M235i PP-Stage 3 x Armytrix full decatted valvetronic exhaust system = +80.2 HP!

2015 BMW M135i w/ Armytrix Performance Valvetronic Exhaust by Hitzproject

Manhart BMW F22 M235i w/ Armytrix Quad-Tips Cat-Back Exhaust By GT Tuning

Gorgeous Volcano Red BMW M235i with Armytrix Quad-tips Valvetronic Exhaust

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

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