The carbon slicktop thread

[Casa de Mesa]

Get the roof bow welded while it's at the shop. Reason #2 answers your question.

Also, I believe you want to drill the spot welds to slowly remove the steel roof versus "cut the steel roof". If Slonik's carbon roof is a 1:1 copy, then you wouldn't need modifications.

A bit more details. I have Slonik's carbon roof bow on the way too, so planning to bond that plus the roof, rather than welding in a BMW steel roof bow.

When I said "cut the roof out" it was tongue and cheek - I know you have to drill or sand out the spot welds. I'm leaning toward belt sanding them out if I end up doing this myself.

Edit: Here is the belt sander, made specifically for this kind of task: https://www.nationaltoolwarehouse.co...r-P296676.aspx

[Epsilon]

Get the roof bow welded while it's at the shop. Reason #2 answers your question.

Also, I believe you want to drill the spot welds to slowly remove the steel roof versus "cut the steel roof". If Slonik's carbon roof is a 1:1 copy, then you wouldn't need modifications.

[Casa de Mesa]

For those that have done this as a DIY or had a shop done it, I have a question.

When fitting these roofs, is there anything that has to be massaged in the actual roof opening of the car? Or once the steel panel/roof is removed (sunroof top in my case), is it only a matter of fitting the roof to the opening/car? I have no experience installing one of these.

Reason #1 for my question. My car is at a shop at the moment in the beginning stages of a full respray. My Slonik carbon roof has been stuck in Russian customs since Jan 4. It originally shipped Dec 7, was returned to Slon for some reason (not their fault), and has been stalled in customs since Jan 4 on it's 2nd trip through. I told the shop to just cut the roof out, paint the car and I'll fit the roof to the car myself once it comes in. However, they are extremely hesitant to go this route because they are a perfectionist restoration shop (not BMW specific) and are their argument is that carbon body panels never "just fit" and always require some modification to the opening. I'm fairly certain that is NOT the case with these carbon roofs, and they only need to be fit to the car. That is, the roof is trimmed to fit the opening, not the other way around.

Reason #2 for asking. I'm leaning towards not having them cut the steel roof out because I do not know when this roof will leave Russia. I'm at about the 75 day mark in transit and thought for sure it would be here by now. But cutting a roof out of your car without knowing for sure when the replacement will show up... taxing on the nerves.

Not Slon Workshop's fault, shit happens.

[Epoustouflant]

Shipping TBD from Karbonius. It's in David's hands regarding a GB. Ana seemed positive on a few key items - no, not the airbox though : (

Thanks for the heads up. I've set them up as Coming Soon. You can get on waiting lists per product to stay updated.

[heinzboehmer]

At checkout, shipping is "free", curious if this is correct

Yeah the euroconnex price is like $600 than directly from Karbonius, assuming shipping is actually free

[fattycharged]

I’m awaiting their return from Holidays. I started listing their products on EuroConnex. I should have news 2nd week of Jan.

At checkout, shipping is "free", curious if this is correct

[heinzboehmer]

I’m awaiting their return from Holidays. I started listing their products on EuroConnex. I should have news 2nd week of Jan.

Is this is? Or are there plans for a separate group buy?

https://euroconnex.co/collections/e4...ral-roof-panel

[Epoustouflant]

Epoustouflant Anything from Karbonius about a group buy on the roof?

I’m awaiting their return from Holidays. I started listing their products on EuroConnex. I should have news 2nd week of Jan.

[0-60motorsports]

Anyone done the M4 style CF roof from Karbonius? Not sure how I feel about the look. Would be nice to see some pictures other than what they have on their site.

https://karbonius.net/producto/bmw-m...anel-m4-style/

That doesnt look bad at all!

[lvm3sm46]

Epoustouflant Anything from Karbonius about a group buy on the roof?

[Cronenberged]

TC design is the first shop that comes to mind. Though I’m sure others are capable (performance technic, VTmotorwerks, edge)

Maybe DanAvoN7 would be down to tackle this?

The first company to perform it isn't far from the bay, Bees something is all I can remember they're done quite a few. There's also a BMW performance.and repair shop near there that would be good at it. They're known for some crazy engine swaps.

[Epoustouflant]

Actively reading through this thread. Lots of great info.

I will definitely ping Karbonius to see if a winter GB on the roof could be possible.

It’s on my to do for the PY.

[Tonggi]

That looks amazing man, start to finish how long did it take and what DIY did you use? Looking to tackle this on my own next year.

I had a lot of time to prep by buying all the tools I needed and had downtime and waiting because I was taking my sweet time and waiting for certain parts to come in I found out last minute


Part 1: Prep (3 hours) Remove entire interior, seats, pillars, moonroof, headliner

Part 2: Drilling out spot welds and removing roof (4 hours) Remove the 4 nuts/washers holding the original, roof rack in place. this makes it easier

Part 3: Prepping roof with sander or angle grinder with the right piece to make sure its all clean (1-2 hours)

Part 4: Install bow this can vary depending on what you do.

Part 5: Prep the roof to have the epoxy(i brushed on everything that was exposed metal and install the carbon roof with clamps (1 hour) I had time so I let it settle for 36 hours

Part 6: Put windshield back

Part 7: Put interior back (1-2 hours)



The waiting from step to step is what took the longest and the drilling.

I watched AJ Hartman's DIY and some Munich Venom and some others DIY on forums and IGs but I combined them all together and used what I wanted.

[CrisSilberGrau]

My recent CF slicktop conversion and headliner/pillars reupholstered

That looks amazing man, start to finish how long did it take and what DIY did you use? Looking to tackle this on my own next year.

[Tonggi]

My recent CF slicktop conversion and headliner/pillars reupholstered