Upgrade Your BMW M3/M4 with Remus 081021 1401 Exhaust Tube

by Dan May 7, 2026

Upgrade Your BMW’s Exhaust System with the Remus 081021 1401 Connection Tube Package with Valves

If you’re searching for a high‑quality exhaust upgrade for your BMW G80, G81, G82, or G83 M Series model, the Remus 081021 1401 BMW G80 G81 G82 Connection Tube Package with Valves is one of the most effective performance and sound enhancements available. Designed specifically for BMW’s S58-powered M3 and M4 models, this premium connection tube package delivers improved exhaust flow, a more aggressive tone, and seamless integration with the factory valve control system. Whether you drive an M3, M3 Competition, M4, or M4 Competition, this upgrade transforms your driving experience while maintaining OEM-level functionality and fitment.

What Is the Remus 081021 1401 Connection Tube Package?

The Remus 081021 1401 BMW G80 G81 G82 Connection Tube Package with Valves is an upgraded stainless-steel connection tube designed to work with Remus sport exhaust systems, specifically part numbers 081021 1500 and 081021 1510. It replaces the stock exhaust tubing with a larger-diameter, freer-flowing 76 mm tube (compared to the OEM 70 mm), allowing your S58 engine to breathe more efficiently.

One of the key benefits of this connection tube package is its integrated valve system. The package uses your BMW’s original actuators and onboard electronics, meaning the factory drive modes and valve behavior remain fully functional. This makes it an excellent choice for drivers who want enhanced performance and sound without compromising daily drivability or OEM features.

Why the Connection Tube Matters

Your exhaust system plays a major role in both performance and sound. The factory tubing is designed for efficiency and compliance, not for maximum flow or acoustic quality. By upgrading to the Remus 081021 1401 connection tube, you immediately unlock several advantages:

Reduced exhaust back pressure
Improved throttle response
More aggressive, sporty exhaust tone
Better compatibility with high-performance Remus mufflers
Optimized flow for tuned or stock engines

For anyone upgrading their exhaust system, the connection tube is a mandatory component when installing certain Remus sport exhausts, ensuring proper fitment and operation of the valve-controlled system.

Key Features and Benefits

The Remus 081021 1401 Connection Tube Package offers a variety of performance, durability, and usability advantages. Here are the standout features that set it apart:

Aggressive Racing Sound: The enlarged tubing and optimized flow path help produce a deeper, more dynamic exhaust note while still maintaining comfort during cruising.
100% Stainless Steel Construction: Built from high-grade stainless steel with a shot-blasted finish, this component is engineered for longevity and corrosion resistance.
Performance Increase with Low Back Pressure: The 76 mm Remus tube significantly reduces restriction, helping the S58 engine operate more efficiently.
Lightweight Design: Reduced weight contributes to improved vehicle dynamics and responsiveness.
Perfect Fitment: Designed to bolt directly onto the factory mounting points for a hassle-free installation.
Handmade in Austria: Precision craftsmanship ensures consistent quality, durability, and performance.
24-Month Remus Warranty: Owners receive peace of mind with a 2-year non-transferable warranty.

Compatibility with BMW M3 and M4 Models

This connection tube is engineered specifically for BMW models equipped with the S58 engine. Compatible vehicles include:

G80 M3 (2021+)
G80 M3 Competition (2021+)
G80 M3 Competition xDrive (2021+)
G81 M3 Competition xDrive Touring (2021+)
G82 M4 (2021+)
G82 M4 Competition (2021+)
G82 M4 Competition xDrive (2021+)
G83 M4 Competition Convertible (2021+)
G83 M4 Competition xDrive Convertible (2021+)

If you're unsure whether the Remus 081021 1401 fits your vehicle, many retailers offer a compatibility check using your registration number or the last seven digits of your VIN.

Why BMW Owners Choose This Upgrade

The Remus 081021 1401 BMW G80 G81 G82 Connection Tube Package with Valves is popular among BMW enthusiasts for several reasons beyond the technical specs. This upgrade provides real, noticeable improvements in daily driving, spirited weekend trips, and even track use.

Drivers often report:

Stronger mid-range pull due to improved exhaust scavenging
A more authentic M-car sound, especially in Sport and Sport Plus modes
Smoother power delivery during aggressive acceleration
No unwanted drone thanks to the integrated valve system

It offers the perfect blend of performance and refinement, making it appealing to both casual drivers and performance-focused enthusiasts.

Ideal Use Cases

This connection tube upgrade is particularly beneficial for:

Owners installing a Remus sport exhaust and seeking the mandatory accompanying hardware
Drivers wanting more sound and performance without tuning or engine modifications
Track-day enthusiasts looking for improved exhaust flow and responsiveness
M3 or M4 owners upgrading in stages as part of a broader performance build

Final Thoughts

The Remus 081021 1401 BMW G80 G81 G82 Connection Tube Package with Valves is a premium, performance-oriented upgrade that enhances the driving experience of any S58-powered BMW M3 or M4. With its stainless-steel construction, increased tube diameter, integrated valve compatibility, and precision engineering, it’s an essential component for anyone looking to get the most out of their Remus exhaust system. Whether you're after better sound, more performance, or simply a higher-quality exhaust setup, this connection tube delivers outstanding results.

For BMW owners wanting a reliable, high-performance exhaust upgrade backed by a reputable manufacturer, this Remus package is a standout choice.