BMW Performance Headers & Downpipes for BMW Z Series E85/6 (2003-2008)

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Headers are a bolt-on component that will make a huge improvement in how your BMW performs. As a replacement for your factory BMW exhaust manifold, our BMW headers provide a more direct path for exhaust gasses leaving your engine. Headers prevent your BMW's exhaust pulses from 'fighting' one another as they leave the head. The end result is that BMW headers give you more power and torque, and you'll love the high-winding top end push that a free-breathing engine exhibits. BMW headers are a must-have if you're doing any engine modifications on your vehicle. Along with a cold air intake, BMW headers provide the free-flowing exhaust necessary to get the most power out of your motor.
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Supersprint Tubolare V1 Performance Headers (60mm) - S54 Z4M ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Supersprint - Corporate Logo
T#:5553275
Part#: 043901KT8
Ships on Sep 4, 2026
$ 5,989.20 USD
$ 5,989.20 USD
Supersprint exhaust is widely recognized as the leader in complete exhaust system upgrades - extremely high quality, well designed for optimal flow, and amazing sound.
Supersprint Tubular Stepped Headers + Sport Cats - Z4 M Coupe/Roadste...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Supersprint - Corporate Logo
T#:2378252
Part#: 044902KT
Ships in 3 Business Days
$ 6,535.99 USD
$ 6,535.99 USD
Experience the latest design innovation from Supersprint for the E85/86 Z4M (MZ4) -- 'stepped' design headers. While the technology has been in widespread use in Formula 1 for awhile, this is the first application of a stepped design on the Z4 M Coupe/Roadster. In an engine that is tuned as much as the S54, airflow management is critical in getting big horsepower numbers from the exhaust. The Supersprint design is the next step in innovation in header design. By slightly increasing the size of the pipe diameters as the exhaust system moves away from the engine, the exhaust can flow more air. Supersprint design is tuned specifically for the S54 engine which is important in making more power without losing low-end torque. The headers merge into a precision-fit merge collector. Total horsepower gain with the complete system over a US Vehicle would be more than 30 hp. 15-19 hp gain over 'Euro-style' headers full stepped tubular and equal length headers bolts to the engine with factory hardware and gaskets used with Supersprint stepped section 1 (with or without cats) Included in this kit are Supersprint metallic sport cats designed to pair right up top Supersprint's own stepped headers. The piping is slightly oversized and the Supersprint sport cats are much freer-flowing than a traditional stock cat. With less restriction, less effort is required to move the exhaust gasses which will free up horsepower and torque. This cat section will only mount to the Supersprint full stepped headers (p/n 044001) and then to any section 2. These cats are built with O2 sensor bungs pre-installed after the cat if you wanted to extend your stock post-cat O2 sensors (however, special software may still be needed). When deciding on the right exhaust the hardest part is feeling confident in the best sound mixed with increased performance, this really leaves you to guess based on reputation. Fortunately, Supersprint has the reputation covered when it comes to BMW exhausts. For over 60 years their goal has always been designing and building the highest quality exhaust available. This has been achieved through extensive testing using real race teams to get the best feedback there is to offer, from the ones who demand the best every day. Extensive dyno testing, high-quality materials, and race team feedback are what allow Supersprint to extract the power from your engine, not just the noise. Supersprint exhausts offer quality, performance, and a great reputation that no other systems on the market can match!
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Flange Steady - Z4
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:47737
Part#: 18207528127
Ships in 6 Business Days
4% off MSRP $ 27.99

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

$ 26.99 USD
Free Shipping on orders $49 and up
4% off MSRP
$ 27.99

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

$ 26.99 USD
Free Shipping on orders $49 and up


Genuine BMW Flange Steady -
This item fits the following BMW Chassis:
E85

Fits BMW Engines including:
M54


Direct-Fit Exhaust Manifold With Catalytic Converter - Cyl 4-6 ...
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Magnaflow - Corporate Logo
T#:31324210
Part#: 50288
Back Ordered
$ 762.00 USD
Free Shipping on orders $49 and up

Replace your faulty or damaged catalytic converter with this high-quality unit designed for BMW vehicles. The catalytic converter plays a crucial role in reducing exhaust emissions by converting harmful gases into less toxic substances. It utilizes an internal honeycomb monolith, washcoat, and a catalyst composed of precious metals to achieve this. However, catalytic converters can degrade over time or get damaged if the engine runs too rich on fuel. If you encounter an oxygen sensor fault and the sensor itself is functional, a failed catalytic converter might be the issue.

  • Stainless Steel Construction: Ensures durability and resistance to corrosion.
  • Federal Emissions Compliant: Meets stringent emissions regulations for peace of mind.
  • Versatile Application: Suitable for both gas and diesel engines.

Ensure your BMW passes emissions tests with ease by upgrading to this reliable catalytic converter.

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Direct-Fit Exhaust Manifold With Catalytic Converter N52 - Cyl 1-3 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Magnaflow - Corporate Logo
T#:26038564
Part#: 5531718
Back Ordered
$ 1,247.00 USD
Free Shipping
$ 1,247.00 USD
Free Shipping

Ensure your BMW's emissions are within regulatory standards with a replacement catalytic converter. Designed to convert exhaust gases into less toxic substances, this stainless steel converter is essential for maintaining environmental compliance. Whether you're experiencing oxygen sensor faults or failed emissions tests, this replacement part provides peace of mind and legal compliance. Formulated for both gas and diesel applications, it meets federal emissions standards and California Air Resource Board requirements.

Benefits:

  • Stainless steel construction for durability
  • Federal emissions compliant design
  • Suitable for gas and diesel applications
  • Meets California Air Resource Board requirements
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Direct-Fit Exhaust Manifold With Catalytic Converter - Cyl 1-3 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Magnaflow - Corporate Logo
T#:31324208
Part#: 50287
Back Ordered
$ 864.00 USD
Free Shipping on orders $49 and up

The catalytic converter is a crucial emissions control device designed to transform exhaust gases from your BMW engine into less harmful substances. Featuring an internal honeycomb monolith, washcoat, and a catalyst made from precious metals, this component effectively reduces toxic emissions. Over time, catalytic converters can degrade, especially if the engine runs rich on fuel. A malfunctioning catalytic converter may trigger an oxygen sensor fault, even if the sensor itself is functional.

To ensure your BMW passes emissions tests and maintains optimal performance, consider replacing a damaged or faulty catalytic converter.

  • Durable Stainless Steel Construction: Ensures long-lasting performance and resistance to harsh conditions.
  • Federal Emissions Compliant: Meets regulatory standards for reduced environmental impact.
  • Versatile Application: Suitable for both gas and diesel engines, providing a broad range of compatibility.
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