BMW Exhaust Parts, Mufflers & Catalytic Converters for BMW E46 M3 S54 (1999-2005)

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Performance exhaust options from the best BMW aftermarket producers and the most reliable replacement maintenance parts are all at Turner Motorsport. Over time, factory exhaust on the cleanest examples of BMW heritage shows their age. Our factory replacement exhausts are just what you need to keep your favorite car in showroom condition or finish off your restoration. If you are looking for a bump in sound and power, you can also find our performance options like Headers, Downpipes, and Mufflers from Corsa, DINAN, and others on this page.

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Genuine BMW Hex Nut Wiht Flange - 07130757758
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Genuine BMW - Corporate Logo
T#:29104
Part#: 07130757758
In Stock
$ 3.09 USD
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Genuine BMW HEX NUT WIHT FLANGE
ECS Exhaust Hanger Locking Collar - 12mm
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ECS - Corporate Logo
T#:40106223
Part#: 053563LA01
Ships on Sep 9, 2026
Sale - Save 10% $ 16.99

This product was last offered at the strikethrough price on
06-14-2026

$ 15.29 USD
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Sale - Save 10%
$ 16.99

This product was last offered at the strikethrough price on
06-14-2026

$ 15.29 USD
Free Shipping on orders $49 and up

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.

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Bav Auto Exhaust Doughnut Stretcher
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Bav Auto Tools - Corporate Logo
T#:580373
Part#: B8800051
In Stock
Sale - Save 25% $ 20.99

This product was last offered at the strikethrough price on
05-03-2026

$ 15.74 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 20.99

This product was last offered at the strikethrough price on
05-03-2026

$ 15.74 USD
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This tool is not vehicle specific and is a universal tool that may or may not work on all applications. This exhaust doughnut stretcher features an offset J-hook to grab onto the rubber rings used to mount most BMW exhaust systems. Features a large coated handle for a comfortable grip.
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Hex Nut - Priced Each
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Genuine BMW - Corporate Logo
T#:360761
Part#: 18301737774
In Stock
$ 2.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 1.99 USD
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$ 1.99 USD
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Improve your BMW's exhaust system reliability with this essential nut used in different areas of the exhaust system. Commonly employed to secure exhaust manifolds to the head or attach downpipes to the exhaust manifolds, this nut ensures a tight and secure fit. Enhance your BMW's exhaust performance and durability by using this high-quality nut designed for crucial connections in the exhaust assembly.
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Rein Copper Exhaust Lock Nut
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Rein - Corporate Logo
T#:348775
Part#: 11621711954
In Stock
$ 1.95 USD
Free Shipping on orders $49 and up

Flange copper nut - priced each

Rein Copper Exhaust Lock Nut is an essential component for anyone looking to maintain or upgrade their vehicle’s exhaust system. This high-quality copper nut ensures a secure and durable fastening, preventing exhaust leaks and ensuring optimal performance. Designed for heat resistance and durability, the Rein Copper Exhaust Lock Nut is perfect for high-temperature environments, making it ideal for both daily drivers and high-performance vehicles.

Turner Motorsport offers this premium copper exhaust lock nut, which is resistant to corrosion and rust, providing long-lasting reliability. Whether you're a professional mechanic or a DIY enthusiast, this copper lock nut is easy to install and ensures the proper fit and function of your exhaust system.

  • Made from high-quality copper for maximum durability
  • Heat and corrosion-resistant to withstand extreme temperatures
  • Perfect for maintaining or upgrading your exhaust system
  • Ensures a secure, leak-free connection
  • Available at Turner Motorsport for easy purchase
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Genuine BMW Exhaust Manifold Stud Bolt - M7x39mm - BMW N52 N20 N54 N5...
Slightly longer than stock with torx head for easy installation
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Genuine BMW - Corporate Logo
T#:19275
Part#: 11127593376
In Stock
$ 2.99 USD
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$ 2.99 USD
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Nuts, bolts, washers, and clips are used to keep your car together, but when you decide to do work on your vehicle, these small components can easily go missing. These ASA Stud Bolts are used in your cylinder head, so needless to say, they are vital to your motor's health. Fits BMW Engines including: N20,N26,N51,N52,N52N,N54,N54T,N55,S55
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Elring Exhaust Manifold Gasket - S54 3.2L
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Elring - Corporate Logo
T#:341254
Part#: 11627830667
In Stock
$ 7.50 USD
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This seals the exhaust manifold to the head. We recommend replacing this any time the exhaust manifold needs to be removed.

Fits the following BMW eninges:
S54 3.2L

Eberspaecher Exhaust Bushing Sleeve - 49mm ID
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Eberspaecher - Corporate Logo
T#:579136
Part#: 21.289.911
In Stock
Sale - Save 22% $ 6.99

This product was last offered at the strikethrough price on
05-03-2026

$ 5.44 USD
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Sale - Save 22%
$ 6.99

This product was last offered at the strikethrough price on
05-03-2026

$ 5.44 USD
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Universal Connector

Rein Exhaust Manifold Nut
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Rein - Corporate Logo
T#:363427
Part#: 11721437202
In Stock
$ 2.03 USD
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This metal nut mounts to the back of the flange on the exhaust manifold towards the engine.

Genuine BMW Exhaust Manifold Stud M7X42 - 11121744057 - E34,E36,E39,E...
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Genuine BMW - Corporate Logo
T#:12542
Part#: 11121744057
In Stock
2% off MSRP $ 3.79

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 3.73 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 3.79

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 3.73 USD
Free Shipping on orders $49 and up

Standard exhaust stud bolts for the header connection to the engine head. 

For the E46 S54, these can be used as extended bolts for aftermarket header systems with thicker than normal flanges.


Genuine BMW Stud Bolt - M7X42
This item fits the following BMW Chassis:
E36 M3,E34,E36,E39,E46

Fits BMW Engines including:
M44,M50,M52,S50,S52

 

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Febi Self-Locking Nut - E21, E24, E31, E36
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Febi - Corporate Logo
T#:404046
Part#: N90085001
In Stock
$ 1.99 USD
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Install new hardware with your new parts. M8
Stainless Steel Weld-In Oxygen Sensor Bung - M18x1.5mm
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Turner Motorsport - Corporate Logo
T#:587345
Part#: TMS02BUNGKT
In Stock
Sale - Save 25% $ 3.99

This product was last offered at the strikethrough price on
06-14-2026

$ 2.99 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 3.99

This product was last offered at the strikethrough price on
06-14-2026

$ 2.99 USD
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Finish your custom exhaust with this T304 stainless steel weld-in oxygen sensor bung. PART DESIGN CNC-cut from T304 Stainless Steel for corrosion resistance Radiused to match 2.50"-3.00" OD tubing for ease of welding Threaded for M18x1.5mm RH oxygen sensors INSTALLATION AND SUPPORT These are universal parts, meaning they have no direct fitment to any particular vehicle. Custom welding and fabrication is required. Special prep/clean procedures must be adhered to for proper welding.
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