Karbonius E46 M3 CSL (S54) Carbon Airbox - Gloss Finish

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T#:35019964

Part#: E46AD02-CF-2

Ships on Aug 3, 2026

$ 2,349.00 USD

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$ 2,349.00 USD

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The ultimate intake for the E46 M3, made from prepeg carbon fiber in the same weave as the Genuine airbox for a OE look. The Karbonius airbox also features carbon fiber intake trumpets in place of the factory's plastic trumps, and are finished to a ultra smooth finish for perfect airflow.

OPTIONAL ESS E46 M3 Alpha-N E-Flash ECU Tuning Software

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Karbonius CSL Carbon Snorkel - E46 M3 (S54) - Gloss

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T#:29931698

Part#: E46AD04-CF-2

Ships in 8 Business Days

$ 779.00 USD

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$ 779.00 USD

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Snorkel extension the allows ducting from CSL bumper to airbox, requires use of CSL style airbox and mounts like the factory flap unit.

Karbonius Carbon fiber Roof - E46 M3 323ci 325ci 328ci 330ci ...

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T#:557976

Part#: 0131T004

Ships in 2 Business Days

$ 2,479.00 USD

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$ 2,479.00 USD

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This is a replacement roof panel for you sunroof equipped or factory steel roof vehicle. Made form carbon fiber to remove as much weight as possible form the highest point of the car lower the center of gravity for increased handling characteristics. Due to the level of modification we recommend professional installation.

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Karbonius E46 M3 CSL Door Handles

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T#:642095

Part#: CSLDOORPULL

Ships on Aug 6, 2026

$ 739.00 USD

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$ 739.00 USD

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This kit includes 2 Karbonius CSL door handles made to pair with their CSL Door Panel Inserts (T#567967 or T#4265306). Will also fit original CSL door panels. Will not fit normal door panels. Estimated shipping time from order 3-5 weeks. Kit includes: Kit of 2 door handles 4 screws Authenticity certificate Features: OEM aesthetic Great fitment guaranteed. Exclusive and numbered piece Great resistance 2 year warranty

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Karbonius E46 M3 CSL Carbon Door Panel Insert Set 1x1 Weave - Gloss F...

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T#:40748584

Part#: E46PP01-CF-1

Ships in 7 Business Days

$ 2,279.00 USD

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$ 2,279.00 USD

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Karbonius replacement inserts for the door cards. Made of 100% carbon fiber and retain use of the speakers. This set is composed of 4 main pieces, 1x1 weave, and a gloss finish. Estimated shipping time from order 4-6 weeks.

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Karbonius E46 M3 / 3-Series Carbon Strut Brace - Gloss Carbon - Silve...

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T#:28104795

Part#: E46SB01-CF-2-AS

Ships on Jul 21, 2026

$ 1,195.00 USD

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$ 1,195.00 USD

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Karbonius Composites has taken inspiration from BMW's performance strut bar to create their own strut bar. The result is an extremely strong but light brace, which adds not only strength and stability, but also a spectacular eye-catching look. Strut tower braces are very common and effective upgrades for a vehicle that allow for improved structural strength while preventing tower flex and alignment changes during spirited driving. This brace is constructed with carbon fiber and comes with a matte finish, natural aluminum color for the tower mounts, and a clear varnish with no logos underlaid. Includes titanium nuts for mounting. No other modifications needed to install. Estimated shipping time from order 3-5 weeks. Features: Perfect fitment and easy installation. 100% carbon fiber Exclusive and numbered piece 6 titanium nuts included. 2-year warranty

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Karbonius E46 M3 / 3-Series Carbon FIber Strut Brace

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T#:28104800

Part#: E46SB01CF

Ships on Jul 21, 2026

Starting at $ 1,195.00 USD

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Starting at $ 1,195.00 USD

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A strut tower bar is one of the most common and effective upgrades in a vehicle. With the installation of a strut brace, the body gets added structural strength, preventing tower flex and alignment changes during sporty driving or while at the race track. Improve your E46-Chassis BMW with the Karbonius Carbon Strut Brace! Karbonius Composites was inspired by the popular, but no longer available BMW Performance strut bar to create a version of their own. They have designed an extremely strong and lightweight brace that not only adds strength and stability, but also a spectacular eye-catching look. The carbon strut bar is manufactured in prepreg carbon fiber and cured in aluminum mold in an autoclave; while the strut tower caps are 5-axis CNC machined, and includes titanium strut tower nuts. Installation Instructions Product Details: Fits all E46 and M3 Offered in standard high gloss, 2x2 carbon weave Natural anodized aluminum strut tower caps 6 titanium nuts included Very light, only 1100g weight Perfect fitment and easy installation 100% carbon fiber prepreg Cured in aluminum mold and autoclave Controlled break zone Exclusive and numbered piece 2-year warranty NOTE: All pieces are numbered to guarantee authenticity and origin.

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Karbonius E46 M3 CSL (S54) Carbon Snorkel - Matte Finish

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T#:35727834

Part#: E46AD04-CFM-2

Ships in 8 Business Days

$ 809.00 USD

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$ 809.00 USD

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Karbonius E46 M3 CSL (S54) Carbon Snorkel - 2x2 Weave and Matte Finish

Karbonius E46 M3 CSL (S54) Carbon Snorkel - 2x2 Weave and Matte Finish is the ultimate performance and style upgrade for BMW E46 M3 enthusiasts. This high-quality carbon fiber snorkel is designed to replicate the renowned CSL design, enhancing airflow efficiency and engine performance while providing a sleek, race-inspired aesthetic. Made with a premium 2x2 carbon fiber weave and finished with a durable matte coating, it offers the perfect balance of form and function. Available through Turner Motorsport, this component ensures authenticity and precision engineering for the discerning BMW owner.

Key Benefits

Precision-crafted for seamless fitment on BMW E46 M3 models
Improves airflow for optimized S54 engine performance
Constructed with a 2x2 carbon fiber weave for superior strength and lightweight durability
Matte finish adds a modern, sporty aesthetic to the engine bay
Inspired by the legendary CSL design for an authentic motorsport upgrade
Available exclusively from trusted BMW performance specialists, Turner Motorsport

Elevate your E46 M3’s performance and style with the Karbonius E46 M3 CSL (S54) Carbon Snorkel - 2x2 Weave and Matte Finish, a must-have for enthusiasts aiming to achieve the ultimate driving experience.

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CSL Air Box Race - S54

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T#:7164824

Part#: E46AD03

Ships in 3 Business Days

$ 2,249.00 USD

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$ 2,249.00 USD

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Intake system made 100% in prepreg carbon fiber in autoclave

Karbonius E46 M3 CSL Concept S54 Engine Cover 2x2 Twill Matte Finish ...

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T#:39329312

Part#: E46TM04-CFM-2-CS

Ships in 8 Business Days

$ 869.00 USD

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$ 869.00 USD

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The piece uses Monoblock Construction, which means that there are no pieces glued that can be released due to vibrations or the heat of the engine and is trimmed in a 5 axis CNC machine, so fitment will be perfect and easy to install!

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Karbonius E46 M3 CSL (S54) Carbon Airbox - Matte Finish

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T#:39329313

Part#: E46AD02-CFM-2

Ships in 8 Business Days

$ 2,449.00 USD

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$ 2,449.00 USD

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The intake generates what is probably one of the best noises of any sports car. The Karbonius CSL Style Airbox weighs in at a scant 1.7kg. It is made with 100% prepreg carbon fiber and baked at 125º in an autoclave at their facility in Spain under ISO 9001 Management Quality System rules by qualified staff.

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Karbonius E46 M3 CSL Concept Engine Cover - S54

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T#:33846585

Part#: E46TM04-CF-2-CSL

Ships on Jul 28, 2026

$ 799.00 USD

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$ 799.00 USD

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Karbonius' carbon fiber engine cover is a recreation of the engine cover featured in the E46 M3 CSL Concept. The cover is made of 100% carbon fiber and comes with a stainless steel trim plate in the center. The cover is composed of a 2x2 carbon twill, matte finish, and a CSL branded plate in the center. Estimated shipping time from order 2-4 weeks. *Note: M logo not included Kit includes: Engine cover Certificate of authenticity Stainless steel plate Features: 100% carbon fiber Reduced weight Easy installation CNC trimmed. Exclusive and numbered piece Awesome appearance 2 years warranty

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Karbonius Carbon fiber engine cover - E46 M3

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T#:567965

Part#: 0131TM001

Ships in 3 Business Days

$ 779.00 USD

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$ 779.00 USD

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This beautiful carbon fiber replacement for the factory plastic cover fits just like OE and has a indentation to place the OE ///M badge for a factory look.

Karbonius Carbon Fiber CSL Style Console - Gloss - E46 M3 330ci 325ci...

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T#:567877

Part#: 0133CD006

Ships in 3 Business Days

$ 919.00 USD

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$ 919.00 USD

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High quality carbon fiber center console, made using the same 1x1 weave as factory for a OE look.

Karbonius M3 E46 CSL Trunk Lid - Gloss Carbon Fiber with Primed Exter...

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For coupe models only.

T#:13036538

Part#: E46TR01-GLOSS

Special Order: No Guaranteed ETA

$ 2,889.00 USD

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$ 2,889.00 USD

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BMW M3 E46 CSL Carbon Fiber Door Panels Inserts - Matte Finish ...

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T#:4265306

Part#: E46PP01

Ships in 3 Business Days

$ 2,279.00 USD

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$ 2,279.00 USD

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Karbonius replacement inserts for the door cards. Made of 100% carbon fiber and retain use of the speakers. This set is composed of 4 main pieces, 1x1 weave, and a matte finish. Estimated shipping time from order 4-6 weeks. *Note: Does not include handles. Recommend use with Karbonius CSL Style door handles (T#642095) This kit includes: 2 panels for the front doors 2 panels for the rear spaces Screws for installation 4 brackets for the front handles Karbonius authenticity certificate

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Karbonius M3 E46 CSL Trunk Lid

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T#:4265270

Part#: E46TR01

Ships in 3 Business Days

$ 2,629.00 USD

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$ 2,629.00 USD

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Karbonius Carbon Fiber M3 CSL Style Trunk for BMW E46 coupe. Constructed of 100% carbon-fiber, this trunk comes with a matte interior finish and a primed and ready to paint exterior. The Karbonius trunk lid includes all necessary holes for the installation of genuine accessories: lights, locks, upholstery, etc and does not require any modification. Per Karbonius this trunk lid is compatible with all E46 Coupe models and will not fit the sedan. Estimated shipping time from order 4-6 weeks. *Note: This trunk is not reinforced for rear wings. Features: Only 12lbs Perfect fitment and easy installation 100% carbon fiber Exclusive and numbered piece Amazing finish 3-year warranty

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Karbonius Carbon fiber cabin filter housing cover - E46

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T#:567876

Part#: 0133TFP004

Ships in 3 Business Days

$ 559.00 USD

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$ 559.00 USD

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High quality carbon replacement for the factory plastic cover, reuses factory hardware and mounting points for clean install.

Karbonius E46 M3 Carbon Vented Hood 100% CFRP Prepreg

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T#:35154923

Part#: E46CP01-CFRP-2

Ships in 3 Business Days

$ 4,049.00 USD

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$ 4,049.00 USD

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E46 Coupe CF Race Door With Frame (Pair) - Matte Interior & Primed ...

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T#:8061335

Part#: E46PD1MATTE

Back Ordered

$ 4,239.00 USD

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$ 4,239.00 USD

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Designed to retain use of all OEM handles, moldings, seals, and locks. These doors are priced each and come with a gloss interior finish and are primed for paint on the exterior. Note that windows are not included. Estimated shipping time from order 6-8 weeks.

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Karbonius E46 M3 CSL Carbon Door Panel Insert Set 2x2 Twill Gloss Fin...

For Coupe models only!

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T#:37149887

Part#: E46PP01-CF-2

Ships in 3 Business Days

$ 2,279.00 USD

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$ 2,279.00 USD

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Carbon Fiber OEM-Style Intake Manifold - E46 M3

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T#:37521034

Part#: E46AD09-CF-2

Ships in 3 Business Days

$ 1,699.00 USD

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$ 1,699.00 USD

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The CSL Airbox is one of the most demanded improvements among BMW M3 E46 enthusiasts. That is both for performance gain and for the sound it brings to the car. On the other hand, it is a laborious, time-consuming, and expensive modification. For those who are looking for a similar sound to the CSL airbox but are not looking for HP gain, we have developed the Karbonius OEM Style S54 airbox. It is a simplified version of the CSL airbox, that, apart from a louder sound from the engine (+12 dB compared to plastic OEM), gives an awesome appearance and allows for easy installation using the stock elbow and MAF sensor. No need to remap! Regarding power increase, we got +4HP in a recent dyno test compared with the OEM airbox. Not really significant considering that dynos can have a 2% margin error. In conclusion, and pending new tests in the future, we can say no significant power increase and no HP loss. NOTES: Need to install with CSL Crankcase breather hose -- BMW # 11157833649) In SMG version, need to install a Genuine BMW CSL SMG Expansion Tank -- BMW # 21532282549 Fitment: BMW M3 E46 BMW Z4 M

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E46 Coupe CF Race Door With Frame (Pair) - Matte Interior & Varnish ...

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T#:23416482

Part#: E46PD1-MV

Special Order: No Guaranteed ETA

$ 4,239.00 USD

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$ 4,239.00 USD

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Lightweight carbon fiber door assemblies for your E46 that drastically reduce weight! Designed to retain use of all OEM handles, moldings, seals, and locks. These doors come with a matte interior finish and clear coat paint on the exterior. Note that windows are not included. Estimated shipping time from order 6-8 weeks. *Note: Some features will not be retained such as speakers or airbags. This kit includes: 2 CF front doors Inner opener handle Karbonius authenticity certificate (Macrolon windows not included) Features: Extremely lightweight (11lbs, each) - Save up to 55lbs per door! OEM mountings can be used Great fitment guaranteed 100% carbon fiber Exclusive and numbered piece Awesome appearance 2 years warranty

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Karbonius Composites for BMW 3 Series E46 (1999-2005)

Sub-Categories

Karbonius E46 M3 CSL (S54) Carbon Airbox - Gloss Finish

Karbonius CSL Carbon Snorkel - E46 M3 (S54) - Gloss

Karbonius Carbon fiber Roof - E46 M3 323ci 325ci 328ci 330ci ...

Karbonius E46 M3 CSL Door Handles

Karbonius E46 M3 CSL Carbon Door Panel Insert Set 1x1 Weave - Gloss F...

Karbonius E46 M3 / 3-Series Carbon Strut Brace - Gloss Carbon - Silve...

Karbonius E46 M3 / 3-Series Carbon FIber Strut Brace

Karbonius E46 M3 CSL (S54) Carbon Snorkel - Matte Finish

Karbonius E46 M3 CSL (S54) Carbon Snorkel - 2x2 Weave and Matte Finish

Key Benefits

CSL Air Box Race - S54

Karbonius E46 M3 CSL Concept S54 Engine Cover 2x2 Twill Matte Finish ...

Karbonius E46 M3 CSL (S54) Carbon Airbox - Matte Finish

Karbonius E46 M3 CSL Concept Engine Cover - S54

Karbonius Carbon fiber engine cover - E46 M3

Karbonius Carbon Fiber CSL Style Console - Gloss - E46 M3 330ci 325ci...

Karbonius M3 E46 CSL Trunk Lid - Gloss Carbon Fiber with Primed Exter...

BMW M3 E46 CSL Carbon Fiber Door Panels Inserts - Matte Finish ...

Karbonius M3 E46 CSL Trunk Lid

Karbonius Carbon fiber cabin filter housing cover - E46

Karbonius E46 M3 Carbon Vented Hood 100% CFRP Prepreg

E46 Coupe CF Race Door With Frame (Pair) - Matte Interior & Primed ...

Karbonius E46 M3 CSL Carbon Door Panel Insert Set 2x2 Twill Gloss Fin...

Carbon Fiber OEM-Style Intake Manifold - E46 M3

E46 Coupe CF Race Door With Frame (Pair) - Matte Interior & Varnish ...

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