September 23. That's when the brand new BMW M3 and M4 Coupe will finally debut after months of leaks, spy photos, and speculation. Last week, BMW released a new batch of teaser photos of the next-generation M3 to get us excited for the big debut this week.

We thought this would be the last teaser, but BMW has released some new, more revealing photos of the new M3 and M4 on social media. While the images are still clouded in green smoke, we get a clearer look at some of the design details.

Once again, BMW is showcasing the M3 and M4 in a new vibrant "Isle of Man Green" color named after the annual Isle of Man TT motorcycle races. One shot provides a close-up of the new M3's kidney-grille emerging from the smoke, confirming it will be just as large as the controversial grille on the new 4 Series. With all the recent leaks and spy photos of prototypes, we've had time to get used to BMW's new design direction, but it's still going to upset some fans.

The remaining shots focus on the interior. In one photo, we get a glimpse of the six-speed manual gear shifter, reassuring enthusiasts that you'll be able to row your own gears in the new M3 and M4.

This transmission option will only be available in the entry-level models, while the Competition version will have an eight-speed automatic transmission. For the first time, we also get a look at the new sport seats featuring fixed headrests, an illuminated M4 logo and contrasting yellow pipeline. A final shot focuses on the M3's rear end, showcasing the car's trunk spoiler, rear diffuser, and quad exhaust system.

In both cars, power will be sourced from a 3.0-liter twin-turbo in-line six producing 473 horsepower in the base model and 503 hp in the range-topping Competition version. The 2021 M3 and M4 are expected to go on sale in US dealers next year, but we'll hopefully find out availability details later this week.