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Armytrix

Stainless Steel Valvetronic Cat-Back Exhaust System

$4,513.60 $4,340.00 Save $173.60

SKU: BMF8ME-QS11B

In Stock
In Stock
Ships by Jul 30
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System is designed to enhance the performance and sound of your BMW M3 and M4. This system increases power, reduces weight, and provides a deep, resonant sporty sound while neutralizing annoying frequencies. It features unique automatic functions that close valves at low RPM for better launch-start without losing backpressure, and open them at high speeds for improved performance.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandArmytrix
Part NumberBMF8ME-QS11B
CategoryExhaust

Buy with Confidence

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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