Air dam difference base vs evosport

[RobZomby]

What’s the difference between the front air dam on the 1988 base m3 and the evosport?
I’m missing the undertray, I’ve talked to Maarcus on here and he has the evosport undertray and carbon fiber splitter but will it fit properly on my 88 base m3 front end without major modification?

[Konig]

The standard M3 has a painted plastic fascia/bumper without any visible addendum - just a little plastic air dam underneath the car. Sport Evolution cars received a different under tray with an extendable splitter. For bonus points - the Evo 2 variant received a different body-colored front bumper extension.

It could be useful to compare using these listings of cars available at EAG for the visual difference:

Standard: https://enthusiastauto.com/bmw/m3ser...coupe-447.html
Evo 2: https://enthusiastauto.com/bmw/m3ser...tion-2408.html
Sport Evolution: https://enthusiastauto.com/bmw/m3ser...tion-2791.html

All of these configurations use the same bumper as a starting point, and the Evo 2 and Sport Evo styles can be fitted. For the Sport Evo, it is not a major modification, but it is not purely reversible and it involves drilling a fair number of holes on the bottom of your fascia. I installed the Sport Evo under tray with an aftermarket carbon fiber splitter, click through to my post below to see the holes and installation process.

https://s14net.vbulletin.net/forum/s14/e30-m3-galleries/1285181-third-time-s-the-charm-1989-lachs-cardinal?p=1285457#post1285457

If you're comfortable with adding the holes, installation is straightforward either for yourself or for a shop and I think it really makes the car look more aggressive!

Here are the parts diagrams, maybe useful:

Standard: https://www.realoem.com/bmw/enUS/sho...diagId=51_0604
Evo 2: https://www.realoem.com/bmw/enUS/sho...diagId=51_0623
Sport Evolution: https://www.realoem.com/bmw/enUS/sho...diagId=51_2005

[RobZomby]

First off thankyou for your detailed reply I am very appreciative. I like to ask a lot of questions… measure twice cut once mentality. There is definitely a visible difference in the “base” fascia air dam and the EVO air dam. It appears that the EVO air dam extends outward by a couple of inches..?? Correct? Would that put the access panel in the completely wrong spot if mounted on my 1988 1st series “Base M3”? I do like the idea of having the undertray and the cf splitter looks nice but will it need to be completely removed every time I need to service the underside of the engine? i.e. oil change etc etc…? Regards