1:1 CSL "GT style" Carbon Diffuser
by CarboProject GmbH
build journal: Special series
"Gone in 60 days" from idea to product in hand.

Most CSL diffusers available on the market are created from a negative mold of an OEM CSL diffuser with slight design variations.

This is good, but not perfect.

This 1:1 CSL carbon diffuser is created from a positive mold. It is an actual 1:1 replica of the Genuine BMW CSL diffuser milled from secretive data.

The GT style diffuser is a derivated of the 1:1 replica. The fins design are revised to a more aggressive look.

In this Special Series on my Build Journal, I take you into the details of what makes this special along with the backstory to this crowdfunding, development, unboxing, fitment reviews.

I sign off with my recommandations on if you should get the paint match service.

Matt / @m3_epoustouflant

The Ridge: 1 to 1 design.

A key design signature of the original design.

OE matching 1x1 weave

2x2 is optional.

Pre-preg & autoclave carbon fiber.

The same carbon manufacturing process BMW used on the original diffuser.

OEM fitment.

The tabs and slots are all here to fit your OEM bumper.

Color match paint service

For any OEM BMW colors. If you seek perfection, a primered version is available.
Spec your diffuser
CSL GT Carbon Fiber Diffuser
CSL GT Carbon Fiber Diffuser
CSL GT Carbon Fiber Diffuser
CSL GT Carbon Fiber Diffuser
CSL GT Carbon Fiber Diffuser
CarboProject GmbH


CSL GT Carbon Fiber Diffuser

  • Factory Direct Process
  • EuroConnex Exclusive
Regular price$1,249.00

"I love this this thing. It stays true to the E46 M3 look while being a little more unique than others."

"The quality, fitment and paint line are exactly what I wanted and expected."


Installation Notes

No hardware is required. This re-uses push pins for lower slots and the upper section is clipped in using tabs on the diffuser.

The Master Mold Creation Process

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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