2026 GT4 Composites carbon fiber parts for sale thread (ex Mile End)

[Gt4]

May I ask why the name change? Are the parts still made by miles end composite? Or did you find another person?

If the name is now your name, are you making the parts now?

All parts were/are always made by JC, Mile End or GT4 Composites. JC has his own business name anyway.

Mile End was made by Derek, he is a member here, just not as active as M3forum.net days. He took the name Mile End to sale parts. But just before Covid, he has been super busy with work and family and had no more time for Mile End. I helped JC and Derek in the past to do test fit of previous pre-production parts on my M3s.

During Covid, I asked JC to do CSL carbon fiber parts for me and he asked me if I was interested to list parts for sale and do test fit on new parts.

Now that I am selling parts for JC and we do everything in carbon fiber instead of fiberglass, I just used the name GT4 Composites. So if Derek wants to use Mile End in the future, it's still available. I have plan to do more stuff under GT4 Composites.

Mile End was basically just fiberglass CSL bumper and CF CSL diffusers. They had huge sucess and a lot of parts were sold. Price were pre-covid and demand was huge, a lot more than capacity to produce. And it made unhappy potential customer who had to wait.

GT4 Composites parts are all CF now and we work to get better fitment as close to perfection for hand built parts. Prices might be too high for some. And it's ok. We aren't looking to expand or do more volume.

[bigjae46]

Should consider offering some of those parts in a spread tow finish. I think that is the next rage in CF now that forged carbon is dying out. Something unique and it is what you see on the F1 car halos. Ferrari uses a 2x2 twill spread tow.

[Gt4]

Should consider offering some of those parts in a spread tow finish. I think that is the next rage in CF now that forged carbon is dying out. Something unique and it is what you see on the F1 car halos. Ferrari uses a 2x2 twill spread tow.

1 member asked for forged carbon in the past and we made his parts in forged carbon.

Otherwise, most guys want same finish as OEM CSL. No one asked spread tow so far.

[x Spades x]

1 member asked for forged carbon in the past and we made his parts in forged carbon.

Otherwise, most guys want same finish as OEM CSL. No one asked spread tow so far.

Oem is reinforced plastic, with CF in the middle right?
would that get the price down a little? This economy is crazy and salaries arent coming close to matching. 😞

[Gt4]

Oem is reinforced plastic, with CF in the middle right?
would that get the price down a little? This economy is crazy and salaries arent coming close to matching. 😞

By same finish I meant 1x1 front splitters. Peoples wants replica parts with similar finish as factory CSL (1x1 vs 2x2).

[bigjae46]

Oem is reinforced plastic, with CF in the middle right?
would that get the price down a little? This economy is crazy and salaries arent coming close to matching. 😞

By plastic - they mean epoxy.

The OEM E92 M3 roof is a 1x1 3k outer layer with a biaxial, some sort of white core material, biaxial and a spread tow on the bottom. There was one more layer that I couldn't make out what it was. That would double the price to produce in both materials and labor to produce a 6 layer composite.

[Gt4]

I have 1 CSL bumper and 1 CSL diffuser ready to go. Can be ship this week, no delay!

I can do $4000usd shipping included if you take both.

[RockyMtnM3]

Received the Gt4 3pc cabin air filter set. The product is beautiful, but honestly I was most impressed by the packaging, worldclass! **NOTE: the picture in bubble wrap is not how it came, just wanted to give an idea**
Fantastic experience, thank you! I am eagerly awaiting the CSL trunk.

[Advorsor]

From now on, I will sell the all carbon fiber parts under the name GT4 Composites. Everything will be made in carbon fiber, no fiberglass anymore. Same bumper as Mile End, just different name!

We offer the following parts:

-CSL front bumpers for aluminum or kevlar rebars. Windshield washer reservoir attach directly to bumper inner beam, OEM suction cups needs to be transfer to CSL bumper with kevlar rebar. You only need to buy front grill and intake duct grill. Comes with CSL splitters in 1x1. Weight appx 7lbs
Price: $2850USD shipping included

-CSL splitters replacement for Mile End/GT4 Composites or OEM CSL in 1x1
Price: $500USD shipping included

-CSL 1-piece front lip for CSL bumper in 1x1
Price: to be determined once mold ready and tested


-CSL trunk
Price: to be determined once mold ready and tested


-CSL diffuser, exposed carbon fiber is 1x1
Price: $1300USD shipping included


-3-piece carbon fiber cabin filter assembly, save 7.5lbs vs stock
Price: $1100USD shipping included

-Cabin filter cover only : $450USD shipping included


-CF rear deck shelf without speaker cutouts. 2x2 and matte finish
Price: $800USD shipping included

-CF trunk floor panel. Saves 2-3lbs over stock.
Price: $500USD shipping included


All parts are available in 1x1, 2x2 and we can make special order in 4x4, forged carbon or natural fiber!


And remember, all CF parts we makes aren’t road legal, they are meant for off-road use only !

What about a non-CSL window washer fluid res?

[Gt4]

What about a non-CSL window washer fluid res?

If you have the kevlar rebar version bumper, reservoir is mount on kevlar rebar and won't be removed during CSL bumper install. So you reuse the same