S65 OEM+ Carbon Plenum
by CarboProject GmbH

Unlike the S54, BMW M never showed us the way to unleash the eargasm of 8x individual throttle bodies.

The GTS had a cool orange painted plastic plenum, and that was it.

A small Germany company actually developed a clever OEM style carbon plenum design in 2007, yet we didn't hear much about it until Summer 2020.

Prior to EuroConnex being a thing, I worked with Rene at CarboProject to do a Group Buy for its OEM+ carbon plenum.

The rest is history.

200+ have been delivered since, and the product has been refined thanks to member inputs.


Matt / @m3_epoustouflant
A clever approach

OEM+ design

This carbon plenum was developed using the lower housing of the OEM plastic plenum.

The top lip is fully replaced & sealed with an enlarged, thinner carbon lid to augment induction noises.

The Specs

Export Version

The Export version was developed in early 2021 from US member feedbacks. It has a thinner, pre-preg, carbon fiber lid for improved induction noise.

Gloss or Matte

The plenum is available in gloss and matte 2 component hardened clear coat. The Gloss finish option is polished and wet sanded for a mirror like finish.

Sticker options

OEM M3 V8 badges, M Power sticker under the clear coat, or naked. You choose.

Flat top only

The lid design was simplified and the 2x functionless OE bolts were removed for sleek aesthetics.

No core needed!

Pricing includes a Genuine BMW core. You get to keep your OEM plenum.

Hear it

Plenum only. No intakes.
Spec your carbon plenum
E9X M3 Carbon Fiber Plenum
E9X M3 Carbon Fiber Plenum
E9X M3 Carbon Fiber Plenum
E9X M3 Carbon Fiber Plenum
E9X M3 Carbon Fiber Plenum
E9X M3 Carbon Fiber Plenum
E9X M3 Carbon Fiber Plenum
E9X M3 Carbon Fiber Plenum
E9X M3 Carbon Fiber Plenum
E9X M3 Carbon Fiber Plenum
E9X M3 Carbon Fiber Plenum
CarboProject GmbH


E9X M3 Carbon Fiber Plenum

Regular price $2,148.00 Sale price$1,389.00
  • Factory Direct Process


  • Made in Germany 
  • CSL style carbon fiber pattern in 2x2 weave
  • Dry Carbon pre-preg construction with autoclave
  • Enlarged carbon fiber lid for improvement aesthetics, sound, and throttle response
  • Export Version is now standard
  • Pricing includes genuine BMW core
  • Available in gloss or matte clear coated carbon finish
  • Available with OE M3 V8 badges, M Power sticker under the clear coat, or blank.
  • Available in flat top configuration only as of Summer 2021. 
  • Easy DIY installation

Installation Notes

This is a simple DIY. Plan for 60 to 120 minutes. Quick tip: grease the rubber couplers before fitting it, and make sure you seal is tight.

a journal entry
Are carbon plenums worth it?

Short answer: yes. Long answer: read the entry :)

I take you into the backstory to this Connex, my unboxing and first drive impressions of the OEM+ S65 carbon plenum by CarboProject.

Member cars with the OEM+ carbon plenum

Complete the kit
CarboProject GmbH

E9X M3 Carbon Intake Elbow

Regular price$624.00

2021 & 2022 Continued Product Development

It was René's goal to offer a complete carbon fiber intake kit for the S65 for 2022, as he builds off the success of the carbon fiber plenum introduced to export markets by EuroConnex in Summer 2020. 

You can read more about René @ CarboProject here

The S65 E9X M3 Intake Elbow:

OEM + Design 

The mold was designed as flow optimized version of the OEM ABS plastic part with slightly thinner material thickness to enhance induction noise and reduce weight by 1 pound. 

Compatible with OEM filters

René designed the elbow to be compatible with OEM dry filters or equivalent OE replacements. 

This is an ideal design choice for those wishing to remain with the confines of OE replacement parts and use Replacement Warranties from the likes of FCP Euro. 

The elbow made in Germany with 100% in prepreg carbon fiber in 2x2 carbon weave and is cured in autoclave. It remains sober in design to appear as an OEM+ component. 

Customizable Aesthetics

The weave is designed to match the S65 Carbon Fiber Plenum  and S65 Carbon Air Filter Lid as is shown on installed pictures - it it oriented at 3 o'clock, top right of an imaginary square for guys out there looking to match this with carbon components from other brands. 

The product is clear coated in 2 component hardened clear coat for a durable finish and resistant to the high temperatures of the engine bay. It is available in Gloss or Matte finish. 


  • Made in Germany
  • 100% carbon fibre pre-preg
  • 1 pounds lighter than OEM 
  • Cured in autoclave
  • 2x2 weave
  • Gloss & Matte finishing available
  • Great easy fitment guaranteed plug & play.
  • CNC machined Secondary Air Pressure Sensor threaded bung. 
  • Includes clamps & rubber fittings. 
  • Filter not included. 
CarboProject GmbH

E9X M3 Carbon Fiber Airbox Lid

Regular price $674.99 Sale price$624.99
CarboProject GmbH

E9X M3 Carbon Fiber Front Air Ducts (2 pc)

Regular price $649.00 Sale price$624.99
Made in germany
The OG Connex

René is the original Connex: the one who first trusted me and started it all.

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