Armytrix BMW F32/F33 420i/430i (B48B20)(2016-2019) valvetronic exhaust system
Unleash the full potential of your BMW F32 420i or 430i Coupé—or F33 Convertible—with the ARMYTRIX Valvetronic Exhaust System, precision-engineered for 2016–2019 models powered by the B48B20 turbocharged inline-four engine. This system brings sharper throttle response, a bold motorsport soundtrack, and full valve control through your smartphone or wireless remote.
Whether you're pushing through mountain passes or gliding through city streets, ARMYTRIX delivers more drama, more flexibility, and more control—without sacrificing comfort or factory refinement.
Fitment:
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Model: BMW 420i / 430i
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Chassis: F32 Coupé / F33 Convertible
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Years: 2016–2019
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Engine: B48B20 2.0L Turbocharged Inline-4
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Drive Type: RWD & AWD
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Drive Orientation: Left-Hand Drive & Right-Hand Drive
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VIN Verification: Strongly recommended to confirm B48B20 engine compatibility
Key Features:
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Wireless Valvetronic Control: Take command of your exhaust valves with the ARMYTRIX OBDII Control Module, compatible with the ARMYTRIX mobile app and included remote control
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Pipework: Free-flowing 3.0” stainless steel piping, expertly TIG-welded for precision, performance, and long-term durability
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Exhaust Tips: Dual 3.5” tips for a sporty, aggressive rear profile
Compatible with 340i/440i rear diffuser for M-Sport models (aftermarket upgrade required)
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CEL-Prevention Technology: Built-in fault code clearing mechanism minimizes the risk of check engine lights caused by OPF or high-flow modifications
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Plug-and-Play Installation: The pre-configured OBDII module slashes install time by up to 30% compared to traditional wired systems
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Direct Bolt-On Fitment: Designed specifically for the F32/F33 chassis—no cutting, no welding, no guesswork
Valvetronic Sound Modes:
Effortlessly adjust your exhaust tone to match your driving style:
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Valves Closed: Smooth and refined—perfect for daily use or early-morning starts
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Valves Open: Aggressive, raw sound with elevated volume and character for spirited driving
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Adaptive Mode: Real-time responsiveness—valves adjust automatically based on throttle input
Included in the Kit:
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Cat-Back Valvetronic Exhaust System
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Dual 3.5” Exhaust Tips
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ARMYTRIX OBDII Wireless Valve Control Module
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Wireless Remote Control
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Complete mounting hardware & installation guide
Please Note:
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Not compatible with B46 engine variants
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Armytrix OBDII Control Module is required for full valvetronic functionality
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340i/440i diffuser required for proper tip fitment on M-Sport rear bumpers
Experience the Sound of Control.
The ARMYTRIX Valvetronic Exhaust System for the BMW 420i/430i isn’t just an upgrade—it’s a transformation. Elevate your driving experience with uncompromised performance, superior sound, and intelligent control that responds to your every command.
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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
Due to the high volume of custom orders and special requests we receive daily, it’s not always possible to have every item readily available in our warehouse at all times. While we strive to maintain stock for popular products, some items may require additional processing time. If you need a product urgently, we highly recommend reaching out to our sales team here before placing your order to confirm availability and estimated delivery times.
Please Note:
- Orders with both in-stock and backorder or out-of-stock products will be dispatched once all products are available to ship together.
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- Shipping estimates are based on courier delivery times and don't include time to despatch.
Delivery & Returns
Delivery & Returns
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Akrapovic Products Lead Time
Please note that for Akrapovic products, there may be a lead time of up to 10 working days depending on current stock levels. Our team will inform you promptly if your order falls within this category and provide you with an estimated delivery date.
Tracking Information
Once your order has been dispatched, we will provide you with a tracking number via email. Additionally, the tracking number will be added to your order notes on our website. This allows you to easily track the progress of your delivery and stay informed about its whereabouts until it reaches your doorstep.
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For information regarding Returns, please refer to our T&C's.
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.
Avon Tuning Limited is an Introducer Appointed Representative of Social Money Limited t/a Payl8r who is authorised by the FCA under Ref. Number 675283. Credit is subject to creditworthiness and affordability assessments. Missed payments may affect your credit file, future borrowing and incur fees.
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."
