Lang Racing Development | E90 Carbon Fiber Roof

We originally started making carbon fiber roof panels for ourselves several years ago because we couldn't find any real race parts in the United States that were made of 100% carbon fiber and designed to be as light as possible. Since that first roof we've expanded our line to include most BMW roofs. Now we're introducing the 4 door E90 roof. We've done a few already and we hope this will be a popular track and race car modification since the 4 door chassis didn't come with a carbon fiber roof from BMW.

We generally have a roof in stock, but even when we don't we can make one in 4 days. Why can we do this? Because when we take your order we can literally walk to our mold and start working on your roof. This has the added benefit of allowing us to focus on what you find important. This is truly a custom made product.

We generally keep our standard design in stock ready to ship out. Our standard roof is composed of 4 layers of carbon fiber (no fiberglass fillers) with a divinycell core. We use plain weave because the tighter weave results in a stronger and stiffer part for this application. We only use structural epoxy resin which allows us to create a lighter weight part than our competitors with the same or better stiffness. We designed our roof to have greater stiffness than a BMW factory roof. Compared to the factory steel roof at 22lbs, our carbon fiber roof is 7lbs maximum. If your car has a sunroof you'll be saving well over 50lbs of weight up top. If the car is caged you can now remove the roof brace because this roof is so stiff it doesn't need any structural support in the center.

These roofs are hand laid in Irvine, California via resin infusion and ship straight to you from the same place they are laid up. They come trimmed and ready to mount. Mounting should be done by a professional body shop. It will require removing the front and rear glass from your car and reinstalling.

We are introducing this to M3Post members for a discounted price of $1215.

Features:

Full carbon composite construction by dry laid carbon and resin infusion

Two step curing process at elevated temperature allows for increased roof stiffness for its weight

OEM full replacement panel

Weighs 7 lbs or less, the lightest carbon fiber roof on the market






Installed Photos:

Beautiful. Now how about some CF doors?

okusa wrote

Beautiful. Now how about some CF doors?

For the 2 door or 4 door?

We're looking into doors as they are one of the biggest places to save weight on these cars once you have a cage and don't need the side impact protection.

LangRacingDevelopment wrote  

okusa wrote

Beautiful. Now how about some CF doors?

For the 2 door or 4 door?

We're looking into doors as they are one of the biggest places to save weight on these cars once you have a cage and don't need the side impact protection.

4 (E90).

Very nice.

okusa wrote

4 (E90).

I believe we may have a mold for those done soon.

Do want badly... and you're local to me too... the want is strong with this mod!!!

PandaM3 wrote

Do want badly... and you're local to me too... the want is strong with this mod!!!

We can install too if needed.

We've been looking for a local e90 and e92
To develop a mounting system for our splitter on. Let me know if you're interested.

LangRacingDevelopment wrote  

PandaM3 wrote

Do want badly... and you're local to me too... the want is strong with this mod!!!

We can install too if needed.

We've been looking for a local e90 and e92
To develop a mounting system for our splitter on. Let me know if you're interested.

Oh wow tempting... And I know you guys are on my way home from work... Might have to get in touch for a track oriented alignment and corner balance.

Don't know if I want a really aggressive track oriented splitter tho for a dual purpose occasional track day car.

Wonder how quickly it comes on and off.

Would be nice to one day do a quick release front splitter and a quick release trunk (so I can mount my second trunk with a spoiler)for track days:)

Btw... Does the cf roof have a cutout for the oe shark fin?

PandaM3 wrote

Would be nice to one day do a quick release front splitter and a quick release trunk (so I can mount my second trunk with a spoiler)for track days:)

Dream on!

PandaM3 wrote

Oh wow tempting... And I know you guys are on my way home from work... Might have to get in touch for a track oriented alignment and corner balance.

Don't know if I want a really aggressive track oriented splitter tho for a dual purpose occasional track day car.

Wonder how quickly it comes on and off.

Would be nice to one day do a quick release front splitter and a quick release trunk (so I can mount my second trunk with a spoiler)for track days:)

Btw... Does the cf roof have a cutout for the oe shark fin?

Forgive me for being direct, if you want a dual purpose splitter then I'm probably not the person to go to. In order for splitters to work they have to be mounted well, which usually means they take more than 10 minutes to take on and off the car. The typical stuff I see on the market does little to nothing for performance and I'm really not interested in creating more products like that.

LangRacingDevelopment wrote  

PandaM3 wrote

Oh wow tempting... And I know you guys are on my way home from work... Might have to get in touch for a track oriented alignment and corner balance.

Don't know if I want a really aggressive track oriented splitter tho for a dual purpose occasional track day car.

Wonder how quickly it comes on and off.

Would be nice to one day do a quick release front splitter and a quick release trunk (so I can mount my second trunk with a spoiler)for track days:)

Btw... Does the cf roof have a cutout for the oe shark fin?

Forgive me for being direct, if you want a dual purpose splitter then I'm probably not the person to go to. In order for splitters to work they have to be mounted well, which usually means they take more than 10 minutes to take on and off the car. The typical stuff I see on the market does little to nothing for performance and I'm really not interested in creating more products like that.

I know... I'm just dreaming...

But agreed, a functional splitter would be sturdy enough to handle the weight of someone standing on it:)

Maybe one day I'll be fast enough on the track to make use of one:)

Now that would really clean things up. Do you have any estimate of the total cost installed? I've been put off before by the amount of labor I've heard is involved.

Any pics installed on a car?

Is it possible to get the roof pre-cut for a sunroof?

Andersson wrote

Is it possible to get the roof pre-cut for a sunroof?

the whole point is for saving weight, lol. You could always CF vinyl wrap your existing roof to achieve the look without going through the hassle of swapping roofs.

I'm local.. What kind of price are we looking at, installed?

Also, any pics on customer cars?

M3ANMACHINE wrote  

I'm local.. What kind of price are we looking at, installed?

Also, any pics on customer cars?

Bump this I'm v interested

Carbon doors sounds epic! I've sent you a pm :-)

Nice to have another option on the market!

Two questions for you:

1. Is there no cut out for the antenna shark fin?

2. If you currently have a sunroof, after removing that is there a separate roof brace or was the sunroof cassette effectively the brace? I'm installing only a rear half cage (weld-in), so I'm wondering whether I'd also need to add the OE roof brace from the non-sunroof E90 when swapping roof skins.

Thanks!

Limey wrote

Now that would really clean things up. Do you have any estimate of the total cost installed? I've been put off before by the amount of labor I've heard is involved.

Any pics installed on a car?

The labor is about 1800$ on a street car with interior, less if its a track/race car.

magus4286 wrote

Nice to have another option on the market!

Two questions for you:

1. Is there no cut out for the antenna shark fin?

2. If you currently have a sunroof, after removing that is there a separate roof brace or was the sunroof cassette effectively the brace? I'm installing only a rear half cage (weld-in), so I'm wondering whether I'd also need to add the OE roof brace from the non-sunroof E90 when swapping roof skins.

Thanks!

We got rid of the shark fin in the roof, most our my customers aren't going to have a radio. If someone wanted that it wouldn't be a problem to cut the necessary holes into the roof.

If you have a sunroof you want to remove the sunroof cassette, that's a lot of weight. Replacing the sunroof cassette with the brace is what you do if you don't have a roll cage. Since you have a half cage you don't need to install the roof brace as the cage is now your roll over protection.

Limey wrote

Bump this I'm v interested

Ralph installed the roof on his car and I believe vinyl wrapped it, I haven't seen it yet myself. Perhaps you can ask him to update his thread:

E90 M3 Carbon Fiber Roof