Armytrix Mercedes-AMG W205 C43/C400/C450 OPF (2019-present) valvetronic exhaust
Unleash the full voice of your 3.0L V6 twin-turbo AMG with the ARMYTRIX Valvetronic Exhaust System, engineered specifically for OPF-equipped Mercedes W205 C43, C400, and C450 models (2019–Present). Designed to restore volume and emotion muted by factory particulate filters, this system delivers aggressive tone, smoother flow, and intelligent valve control—without compromising daily driveability.
Whether you’re in a saloon, coupé, or estate, ARMYTRIX gives you real-time control over your exhaust note via remote, smartphone app, or integrated Dynamic Select mode (for facelifted models). With plug-and-play OBDII integration, installation is fast and hassle-free.
Fitment:
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Models:
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Mercedes-AMG C43 (W205)
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Mercedes-Benz C400 / C450 (W205)
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Years: 2019–Present
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Engine: 3.0L V6 Twin-Turbo (M276)
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Body Styles: Saloon / Coupé / Estate
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Drive Orientation: Left-Hand Drive & Right-Hand Drive
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Exhaust Type: OPF-equipped models only
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Control Module: ARMYTRIX OBDII Required
Important Fitment Notes:
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System designed for standard exhaust vehicles only
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To fit models with AMG Performance switchable exhausts, an additional clamp is required, and hanger modification is necessary
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VIN and exhaust photos must be submitted to confirm correct configuration before ordering
Key Features:
Valvetronic Control via OBDII (Remote + App + Dynamic Select):
Enjoy total control over your exhaust valves with the ARMYTRIX wireless remote or mobile app.
Facelifted models support full Dynamic Select Integration:
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Comfort → Valves Closed
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Sport → Auto
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Sport+ → Valves Open
Dual 2.5” Mandrel-Bent Stainless Steel Main Pipes:
Optimized for OPF systems, the precision-engineered pipework improves turbo response, flow efficiency, and overall exhaust tone while keeping emissions-compliant hardware in place.
OPF-Compatible with CEL Suppression:
ARMYTRIX's advanced fault-code clearing system minimizes Check Engine Light triggers when modifying OPF-equipped vehicles.
Plug-n-Play OBDII Module:
No complex wiring or in-cabin switches—connects directly to your OBDII port and reduces installation time by up to 30% compared to traditional systems.
Valvetronic Sound Modes:
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Quiet Mode (Valves Closed): Subtle tone for neighborhood or cold starts
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Race Mode (Valves Open): Aggressive, raspy V6 bark with turbo spool and crackles
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Auto Mode: Smart valve response based on RPM/throttle input via ARMYTRIX app
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Dynamic Select (Facelift Models): Drive mode-linked exhaust control for seamless OEM integration
What’s Included:
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ARMYTRIX Valvetronic Cat-Back Exhaust System (2 x 2.5”)
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Quad Performance Exhaust Tips (finish options available)
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Wireless Remote Controller
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Plug-n-Play OBDII Valve Control Module
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Mounting Hardware Kit
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Digital Installation Manual
System Compatibility & Notes:
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For Mercedes-AMG W205 C43 / C400 / C450 (2019–Present) OPF-equipped models
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Supports both Left-Hand Drive and Right-Hand Drive
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Not a direct fit for AMG switchable exhausts—modification and extra clamp required
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VIN and exhaust system photos required prior to purchase
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Professional installation recommended
Revive Your AMG’s True Voice. Intelligent Control. Undeniable Presence.
The ARMYTRIX Valvetronic Exhaust System brings the AMG C-Class V6 back to life—turning down the restrictions and turning up the emotion with valve control, rich tone, and full OPF compliance.
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All purchases on this website our subject to our Terms and Conditions. Please ensure you have read and understood these before making a purchase. If you have any questions, please feel free to contact us and we will endeavour to answer any questions you may have.
PLEASE BE AWARE: Sports cats can NOT legally be installed on a vehicle for use on a public road that was manufactured after 1st March 2001 unless type ECE 103R approved - this can be identified in either the product description and/or in the Technical Information section listed. If you have any doubt on this approval, please contact us immediately for confirmation. Fitting a De-Cat/Cat Bypass, DPF delete/bypass or GPF delete/bypass to a vehicle that is to be used on UK roads will cause the vehicle to fail the MOT emissions test, therefore rendering it unroadworthy and illegal to be used on the road. Therefore, any such products are strictly sold as off-road or motorsport use only and NOT for road use. The vehicle should be transported from place to place via a trailer, flatbed or other recovery means.
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Email: Store@avontuning.co.uk
Phone: 01454 800 117
Online we currently accept payment from the methods listed above including a wide range of finance options.
Finance Options
In order to get the kit you want, when you need it, without ruining the family finances we offer a highly flexible range of finance options to help you get the best products on your vehicle now rather than at the end of the season when you've saved up the cash to make the purchase. There are even interest free options which effectively spread the cost without costing you any extra.
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What Our Customers Are Saying
Mark W.
“Thanks to James and Marcus at Avon Tuning for arranging and fitting a Quicksilver exhaust to my new Defender V8. Everything went like clockwork and it sounds awesome”
Paris C.
"Would highly recommend Avon Tuning. They're extremely knowledgeable, outstanding customer service - we even had a lovely courtesy car for the few hours they had ours. You're in good hands with Avon Tuning!"
Richard N.
"I’d give 6 stars if they’d let me! Avon Tuning did the most fantastic job. I arranged everything with James at the beginning and he was so helpful, guiding me to the correct exhaust system (Miltek) and a Stage 1 Remap"
Peter B.
"Amazing service from James and the team at Avon Tuning.Fitted a new exhaust system on my Aston Martin Vantage, not only does it sound and look great but it puts smiles per miles for me."
