BMW Performance Headers & Downpipes for BMW E46 M3 S54 (1999-2005)

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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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Cylinder Head To Exhaust Manifold Stud & Nut Kit - E46 M3 ...

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T#:636980

Part#: 07129900298KT

Ships in 3 Business Days

$ 103.99

This product was last offered at the strikethrough price on
03-04-2026

$ 96.99 USD

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$ 96.99 USD

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This convenient kit includes all the hardware you need to replace your old, rusted (or broken) exhaust manifold studs on your S54 engine's head.

Supersprint Tubular Stepped Headers + Sport Cats - E46 M3

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T#:5958739

Part#: 044002KT

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$ 6,184.99 USD

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$ 6,184.99 USD

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Experience the latest design innovation from Supersprint for the E46 M3 -- '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 E46 M3. 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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Supersprint Partial-Stepped V2 Headers (Bolts to Euro Section 1 Exhau...

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T#:177998

Part#: 789801

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$ 3,460.99 USD

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$ 3,460.99 USD

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Special Pricing! These Supersprint 'partial-stepped' headers for the Euro E46 M3, MZ3, and Z4 M are a replacement for the stock manifolds/cats. These are the tubular 'stepped' equal length headers (not the full racing stepped headers) - the header pipes increase in diameter the further they get from the engine until terminiating in a stock Euro-type flange. These stepped headers will bolt to the stock section 1 of the Euro exhaust. For making E46 M3 horsepower and performance gains, headers are right at the top of the list (along with changing the rear end gears). Since the stock catalytic converters are in the original exhaust manifolds, using any type of tubular non-cat manifolds will give instant power gains. The Supersprint headers are full 304 stainless steel (not mild steel) for better heat dissipation and heat resistance to cracking and de-forming (any headers not made from stainless suffer from structural problems). Supersprint designs their headers with CAD programs and 50 years of exhaust tuning experience. These headers are an improvement over any 'Euro style' header on the market. This part is designed for the Euro market with the correct flanges for the Euro exhaust and the O2 and EGT sensor ports pre-installed. Special software or stand alone engine management would be required to keep check engine and fault codes from appearing. Software is recommended to maximize the performance gains from this header upgrade.

Supersprint exhaust is widely recognized as the leader in complete exhaust system upgrades - extremely high quality, well designed for optimal flow, and amazing sound. Even at a premium price Supersprint is an unbeatable exhaust design because every aspect is done to such a high level. Most Supersprint systems are built with larger diameter piping to improve exhaust flow which helps the engine do less work and make more horsepower! Supersprint exhausts generally run at a premium over other systems but no other system on the market can match their quality, performance, or reputation!

Section 1 / Catalytic Converter Options
This header works with the flanges on the Euro section 1 (clocked differently than the US exhaust). It only works with the stock Euro section 1 or similar.

A Euro section 1

Header Details

section:	headers
connects to:	stock Euro section 1 or Supersprint section 1 straight pipes or metallic cats
material:	T304 stainless steel

This part alters or deletes the emissions equipment on your car. Because of this, we require a waiver of emissions compliance to be signed and sent in to Turner Motorsport. You can download the waiver here.

This item fits the following BMWs:
2001-2006 E46 BMW M3

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American Racing Headers Long System - BMW E46 M3 - Catted

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T#:26504963

Part#: BMW46-01134300LS

Ships in 10 Business Days

$ 3,301.99 USD

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$ 3,301.99 USD

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Direct-Fit Catalytic Converter - Front E46 Z3 S54 3.2L Engine ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:375526

Part#: 50415

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$ 1,156.00 USD

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$ 1,156.00 USD

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The catalytic converter is an emissions device that converts the exhaust gasses exiting the engine into a less toxic substance. This is achieved through the internal honeycomb monolith, washcoat, and the catalyst itself that commonly consists of a mix of precious metals. Unfortunately the catalytic converters do not last forever, and can be damaged if the engine is running too rich on fuel. If you're getting an oxygen sensor fault, and the sensor is ok, the likely cause is a failed catalytic converter. Relieve worry about an upcoming emissions test and replace your faulty or damaged catalytic converter. Stainless steel construction Federal Emissions compliant design Formulated for Gas and Diesel Applications

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BMW Performance Headers & Downpipes for BMW E46 M3 S54 (1999-2005)

Cylinder Head To Exhaust Manifold Stud & Nut Kit - E46 M3 ...

Supersprint Tubular Stepped Headers + Sport Cats - E46 M3

Supersprint Partial-Stepped V2 Headers (Bolts to Euro Section 1 Exhau...

American Racing Headers Long System - BMW E46 M3 - Catted

Direct-Fit Catalytic Converter - Front E46 Z3 S54 3.2L Engine ...

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