Armytrix McLaren 720S (2017-present) valvetronic exhaust system
Unleash the full fury of the McLaren 720S with the ARMYTRIX Valvetronic Exhaust System, purpose-engineered for the 2017–2023 4.0L M840T twin-turbo V8. Whether you’re hitting the track or carving through winding roads, this system gives you complete control over your exhaust note—thanks to a fully wireless valve control system integrated through the OBDII port.
Crafted from premium-grade stainless steel with dual 3” main pipes and quad 3.4” tips, the ARMYTRIX system is designed to elevate throttle response, enhance turbo acoustics, and intensify your driving experience—all while reducing CEL risks through fault-code clearing tech.
Fitment:
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Model: McLaren 720S
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Years: 2017–2023
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Engine: 4.0L M840T Twin-Turbocharged V8
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Drive Orientation: Compatible with Left-Hand Drive & Right-Hand Drive
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Control Module: ARMYTRIX OBDII Required
Key Features:
Valvetronic Control via OBDII (Remote + App):
Switch effortlessly between stealth mode and supercar roar using the included wireless remote or ARMYTRIX mobile app. All functions operate via the vehicle’s OBDII port—no hardwiring or cabin modifications required.
Dual 3” Mandrel-Bent Stainless Steel Pipes:
Free-flowing 3” dual pipes minimize exhaust restriction, sharpen throttle response, and bring out the full potential of the M840T twin-turbo V8.
Quad 3.4” Exhaust Tips – Race-Inspired Finish:
Precision-crafted quad tips offer an aggressive visual statement and deliver a clean, high-performance aesthetic.
Built-In Fault Code Suppression System:
Exclusive ARMYTRIX tech clears catalytic converter & OPF-related error codes—reducing the chance of Check Engine Lights (CEL) when upgrading from stock.
System Compatibility & Notes:
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Fits Both LHD & RHD McLaren 720S Models
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Direct Bolt-On Installation – No welding or cutting required
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Plug-n-Play OBDII Module – Cuts installation time by up to 30%
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Recommended for full system integration and optimal sound
Valvetronic Sound Modes (Remote + App Controlled):
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Quiet Mode (Valves Closed): Refined, lower-volume tone for street or city use
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Race Mode (Valves Open): Aggressive, high-output sound with raw turbo harmonics
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Auto Mode: Adaptive valve modulation controlled via the app based on RPM and throttle input
What’s Included:
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ARMYTRIX Valvetronic Exhaust System (Dual 3” Pipes)
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Quad 3.4” Exhaust Tips (Finish Options Available)
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Wireless Remote Control
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Plug-n-Play OBDII Control Module
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Full Installation Hardware Set
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Step-by-Step Digital Installation Guide
Important Notes:
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OBDII Control Module Required for full valvetronic function
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System fits both LHD and RHD models
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Check OPF/Non-OPF compatibility prior to ordering
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Professional installation recommended
Hypercar Sound. Intelligent Control. Race-Bred Engineering.
Transform your McLaren 720S with the ARMYTRIX Valvetronic Exhaust System—built for drivers who demand more than just performance. It’s time to hear your McLaren the way it was meant to sound.
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T&C's
T&C's
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.
Stock Availability
Stock Availability
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Please Note:
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Delivery & Returns
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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."
