BMW Exhaust Parts, Mufflers & Catalytic Converters for BMW 3 Series E46 (1999-2005)

When we set out to build an exhaust for the BMW E46 323/328, we knew it needed to match how you drive and how you want your car to sound. We also know that while many drivers wish for an aggressive, head-turning exhaust note, they don’t always want the volume all the time. That’s why we engineered this lightweight Turner Motorsport performance exhaust system with a fully valved muffler, giving you the ability to switch between a refined, quiet tone and a loud, spirited sound at any moment.

Our new Turner Cat-Back Exhaust is the first valved rear section designed specifically for the E46 323/328. With the included remote controller, you can change your exhaust tone with a simple click. With the valve closed, the system delivers a smooth, deep, tasteful note for daily driving. Open the valve, and you unlock an aggressive, free-flowing exhaust tone that brings out the full character of the M52 engine, perfect for track days or anytime you want maximum sound and performance.

For maximum flow and durability, we built this system using dual 2.0" T304 stainless steel mid-pipes that bolt directly to your factory downpipes. Inside the mid-section, we integrated an X-pipe to balance exhaust pulses, reduce backpressure, increase performance, and smooth the exhaust note. The dual 2.0" mid-pipes merge into a 3.0" axle-back section and a full 3.0" valved muffler, finished with bold 3.0" integrated tips that perfectly fill the E46 rear bumper.

Modern performance cars use valved exhaust systems as standard equipment, but the E46 never truly benefited from that technology. Some early E46 models used a basic vacuum-controlled valve, but after nearly 20 years, most are no longer functional. By studying BMW’s original concept and improving it with modern engineering, we created a lightweight, high-performance valved exhaust that gives your BMW E46 323/328 modern sound control, better flow, and a dramatically enhanced driving experience.

Part Design & Engineering

In-house Turner Motorsport design using FARO ARM laser scanning and SolidWorks 3D CAD for precise BMW E46 fitment
T304 stainless steel construction with 1.25mm wall thickness, TIG-welded and back-purged for superior strength
2.0"–3.0" mandrel-bent stainless tubing for optimal flow and performance
T304 stainless 12mm barbed hangers TIG-welded in OE locations for perfect alignment
Direct-fit flanges engineered to bolt to factory BMW 323/328 downpipes
Over 20 lbs lighter than the factory cat-back exhaust
Designed for smoother flow, reduced backpressure, and improved exhaust tone
Kit Contents

2.0" Mid-section with integrated X-pipe
New center exhaust brace
3.0" valved muffler with integrated 3.0" tips
Valve controller with installation kit and two remote fobs
New downpipe hardware to replace seized factory studs
All required gaskets, clamps, and installation hardware

Revolutionize your driving experience with the E46 M3 Valved Performance Catback Exhaust from Turner. Crafted for the discerning driver, this lightweight and free-flowing exhaust boast two independent valved mufflers, offering two distinct driving experiences. Shedding 19lbs or more from the factory exhaust, the Turner catback delivers refined daily driving with closed valves, providing a smooth exhaust note. When the valves open, unleash an untamed racecar roar, experiencing heightened performance and a pure S54 sound. The flexibility to switch between the two at the touch of a button offers the best of both worlds.

Key Features:

• 19lbs or more weight savings
• In-house design using FARO ARM laser scanning and SolidWorks 3D CAD modeling
• Retains factory emissions
• Compatible with factory or aftermarket headers/front sections
• Mandrel-bent dual 2.5" 304SS pipe
• High-flow dual valved, stainless steel mufflers
• Vacuum actuated valves for adjustable sound
• Integrated x-pipe for improved exhaust note
• Kit includes E46 M3 midsection, dual valved mufflers, valve actuators, remote key fobs, exhaust gaskets and hardware, new center exhaust hangers
• Optional 3.5" Brushed or Chrome tips
• Free Doorbuster: S54 Open Intake

S54 Open Intake:

Amplify airflow and let your S54 breathe with the Turner Open Intake System. With a 200% greater flow than the factory airbox, this intake enhances induction noises, providing an exhilarating auditory experience. The design integrates seamlessly with OE fresh air scoops, maintaining stock mounting locations and incorporating a 4" conical filter for maximum flow and filtration efficiency.

Features:

• 200% greater flow than the factory airbox
• Wrinkle Black Powdercoated Heat Shield
• Precision fit heat shield for cool air intake
• Utilizes OE fresh air inlet scoop
• Aluminum MAF housing maintains OEM MAF scaling
• 4" conical hi-flow reusable air filter

TURNER E46 325i VALVED CAT-BACK EXHAUST

When you're choosing an exhaust, you shouldn’t have to compromise between spirited performance and neighborhood-friendly volume. The Turner Valved Cat-Back Exhaust delivers the best of both worlds: tame when you want it, rowdy when you don’t! Lightweight, performance-driven, and specifically designed for your E46, this exhaust offers instant control over your car’s sound and power output.

With a simple press of a button, the exhaust valves adjust to match your mood or driving environment. Keep them closed for a deep, resonant tone or open them wide for full-throttle power and exhilarating sound. Engineered to withstand high performance and everyday driving, this exhaust will elevate your BMW experience.

Key Features:

Dual 2.0" Stainless Steel Mid-Pipes: Smooth airflow for reduced back pressure, connecting seamlessly to factory downpipes. Integrated X-Pipe: Reduces back pressure and improves exhaust tone. Full 3" Valved Muffler: Delivers aggressive sound when open; quiet and refined when closed. Integrated 3" Tips: Perfectly fill the rear diffuser with a polished finish. Lightweight Design: 23 lb weight reduction over factory exhaust. Complete Kit Includes:

2.0" Mid-section with X-pipe integration 3" Valved Muffler and integrated tips Exhaust valve control kit with two remote key fobs Gaskets, clamps, and complete mounting hardware Installation instructions available in the installation tab. ECS E46 325 LUFT-TECHNIK INTAKE SYSTEM

Take your driving experience up a notch with the ECS Luft-Technik Intake System! Designed to increase airflow and unlock captivating induction sounds, this intake system frees your engine from the restrictive stock intake box. Enjoy a noticeable boost in both performance and sound.

Benefits:

Significant Airflow Increase: 71 CFM gain over stock (27% increase). Enhanced Induction Noise: Adds a sporty, satisfying sound. Seamless Factory Integration: Retains stock MAF location and mounts to existing air induction track. Premium Design:

Wrinkle-Black Powder Coated Aluminum Tubing: Engineered from durable 6061 and 5052 aluminum. 7” Oiled Cotton Gauze Filter: Red filter maximizes air intake. Silicone Inlet Boot: Replaces failure-prone factory intake boot, providing smoother airflow and greater durability. Complete Kit Includes:

7” Oiled Filter (Red) Silicone Inlet Boot with improved flow characteristics Aluminum MAF Flange Mounting brackets, clamps, and all necessary hardware Turner Motorsport and ECS Tuning developed these products with precision, using FARO ARM laser scanning technology and CAD modeling for perfect fitment. Elevate your E46 with this exclusive package, and experience a total transformation in performance and sound!

Drop 10 lbs and replace your midpipes/resonator for a free flowing X-Pipe to get a smoother sound and decreased back pressure!

An X-Pipe can do wonders for your engine for performance and sound. Exhaust gasses come out of your motor in pulses from each individual cylinder, with a cross-over or x-pipe the exhaust gasses meet in the middle and combine. The result of the combining gasses is a smoother path leading to lower amounts of back pressure, a more free-flowing exhaust and leads to increase power and response. Combine with a new rear muffler for best results!

BMW's straight six motors have been referred to as sounding like chain-saws, and being "raspy" or "metallic". Transform your exhaust with our mid section exhaust with an integrated x-pipe to smooth out your exhaust tone and enjoy the sound of your M54! The mid section x-pipe comes with new hardware for connection to the downpipes and includes superior exhaust sleeves to slide over your factory rear section.

Part Design:

Turner In-house designed and engineered using FARO ARM laser scanning technology and SolidWorks 3D CAD modeling for precision fitment.
T304 Stainless Material in a natural finish - 1.25mm wall thickness, back purged and TIG-welded throughout
2.0"OD Stainless Steel Mandrel Bent Tubing
T304 Stainless Steel 12mm barbed exhaust hangers Tig-Welded in OE locations for precise fitment.​
Flanges to mate up to your factory downpipes
10 lb weight reduction from factory midpipes
Designed for smoother flow path and less backpressure
Kit Contents:

E46 325/330 Mid Section With Integrated X Pipe
New downpipe hardware to replace your seized exhaust studs
2 Dual Clamps Exhaust Sleeves for easy installation to your factory exhaust

Tired of busting your knuckles from old hardened exhaust hangers?

This Schwaben tool removes the hanger by pressing on the steel hanger bracket and pulling the rubber hanger in one motion. Self centering force pin locks onto the pin while the flat paddle pulls off the rubber hanger from behind. Slim profile and a 25 degree offset works in tight areas.

Upgrade your exhaust system with the Downpipe To Cat-Back Reducer.

Engineered for optimal performance and durability, this reducer allows for seamless connection between your downpipe and cat-back exhaust system. Its high-quality construction ensures a tight seal, reducing exhaust leaks and enhancing overall exhaust flow. With easy installation and compatibility with various exhaust systems, this reducer is a must-have for any performance enthusiast.

• Allows for seamless connection between downpipe and cat-back exhaust
• High-quality construction for durability
• Tight seal reduces exhaust leaks
• Enhances overall exhaust flow
• Easy installation and compatibility with various exhaust systems

Achieving precise exhaust fitment can be tricky—especially when the exhaust hanger has room to slide. This movement can cause annoying rattles or even lead to contact with the underbody or rear bumper. The ECS Tuning Exhaust Locking Collar offers a simple and effective fix. Designed to clamp securely around the exhaust hanger, this collar keeps everything firmly in place, eliminating unwanted movement.

Crafted from high-strength 6031 billet aluminum and finished in a sleek black anodized coating, it delivers both durability and corrosion resistance. With this collar in place, your exhaust stays exactly where it should—no rattles, no surprises.

Product Design:

Made from precision machined 6061 aluminum Black anodized finish Stainless steel M5 X 0.8mm hardware Installation & Support:

Install the locking collar around your exhaust hanger, position the hanger in place, and snug the locking collar down in place against the hanger! ECS Exhaust Hanger Locking Collars are available for 10mm and 12mm exhaust hangers. Please measure your hangers before ordering. The 10mm locking collar can be found HERE.

Achieving precise exhaust fitment can be tricky—especially when the exhaust hanger has room to slide. This movement can cause annoying rattles or even lead to contact with the underbody or rear bumper. The ECS Tuning Exhaust Locking Collar offers a simple and effective fix. Designed to clamp securely around the exhaust hanger, this collar keeps everything firmly in place, eliminating unwanted movement.

Crafted from high-strength 6031 billet aluminum and finished in a sleek black anodized coating, it delivers both durability and corrosion resistance. With this collar in place, your exhaust stays exactly where it should—no rattles, no surprises.

Product Design:

Made from precision machined 6061 aluminum Black anodized finish Stainless steel M5 X 0.8mm hardware Installation & Support:

Install the locking collar around your exhaust hanger, position the hanger in place, and snug the locking collar down in place against the hanger! ECS Exhaust Hanger Locking Collars are available for 10mm and 12mm exhaust hangers. Please measure your hangers before ordering. The 12mm locking collar can be found HERE.

For secure exhaust connections, choose the 2.25" (57mm) Exhaust Clamp.

Engineered for durability and reliability, this clamp ensures a tight seal for your exhaust system components. Its high-quality construction and corrosion-resistant finish provide long-lasting performance, even in harsh conditions. With easy installation and a precise fit, this exhaust clamp is a must-have for any vehicle owner.

• Ensures a tight seal for exhaust system components
• High-quality construction for durability
• Corrosion-resistant finish for long-lasting performance
• Easy installation for convenience
• Precise fit for secure connections

Turner Motorsport Rolled Angle Exhaust Tip - 3.0 Inlet - 3.0 OD - Stepped Left - Chrome brings a sleek and stylish upgrade to BMW exhaust systems. This high-quality exhaust tip features a striking chrome finish and a rolled angle, stepped design that adds both aesthetics and performance to your vehicle. Its precision design ensures a perfect fit and a bold look. With a 3.0-inch inlet and 3.0-inch outer diameter, this exhaust tip is designed to enhance the visual appeal of your BMW's exhaust system.

• Premium Chrome Finish: Adds a high-gloss, polished look to your vehicle’s exhaust.
• Rolled Angle Design: Provides a stylish and aggressive appearance.
• Stepped Left Design: Ensures a precise fit and a distinctive look.
• 3.0-Inch Inlet & Outer Diameter: Perfectly matches BMW exhaust systems for a seamless upgrade.
• Durable Construction: Built to withstand the elements and maintain its shine.

Universal 2.5" inlet to 3.5" outlet exhaust tip. Priced per exhaust tip.

Over the years, it is not uncommon for exhaust tips to be damaged and corroded, becoming a "sore spot" of your BMW. To remedy this unsightly feature, we now offer our very own exhaust tips! Featuring stainless steel construction and a simple, yet sporty design, this exhaust tip will look perfectly at home on almost any model.

Features & Specifications:

Swivel feature for perfect alignment of the exhaust tips in the rear bumper
2.5" Inner Diameter
3.5" Outer Diameter
Brushed Aluminum Finish
Double Wall Construction
Angle Cut Style
Includes Stainless Steel Clamp

Universal 2.5" inlet to 3.5" outlet exhaust tip. Priced per exhaust tip.

Over the years, it is not uncommon for exhaust tips to be damaged and corroded, becoming a "sore spot" of your BMW. To remedy this unsightly feature, we now offer our very own exhaust tips! Featuring stainless steel construction and a simple, yet sporty design, this exhaust tip will look perfectly at home on almost any model.

Features & Specifications:

Swivel feature for perfect alignment of the exhaust tips in the rear bumper
2.5" Inner Diameter
3.5" Outer Diameter
Brushed Aluminum Finish
Double Wall Construction
Angle Cut Style
Includes Stainless Steel Clamp