For your situation, I would suggest focusing on the suspension before chasing more power. Here is my technical take:

1. **MSS Adjustable Springs vs. KW HAS Kit**: I went with the MSS Hybrid Adjustable Springs BMW G80 M3 and honestly, it’s a game changer for daily driving. It keeps the adaptive dampers but fixes that stiff low-speed bounce. The KW HAS Height Adjustable Spring Kit G80 M3 is also great, but the MSS feels a bit more compliant on rough streets.

2. **Brake Upgrades**: If you're hitting the track, the stock pads will fade fast. I’d swap in EBC Brakes Racing RP-1 Track Pads and some Castrol SRF React Racing Brake Fluid.

Be careful with aero kits tho... some cheap ones actually add drag without real downforce. Stick to functional stuff! gl!

ngl i've had a bit of a rough time with expensive mods lately, so i'm gonna be the voice of caution here... i honestly think you should start with the basics before dropping thousands on aero. for the g80, the best bang-for-your-buck is definitely just high-quality spacers. i grabbed the Macht Schnell Competition Wheel Spacer Kit - 12mm/15mm for BMW G80 M3 and it literally fixes the stance for like $200. also, if you're worried about reliability like i am, maybe skip the heavy tunes for a bit and just get a BMC High Performance Replacement Air Filter for BMW G80 M3 for better flow without the headache. i tried a cheap carbon lip and it cracked in a week... totally not worth it, so basically just stick to the small stuff first!! gl!

yo congrats on the G80! honestly i was in the same boat a few months ago and wanted to mod without breaking the bank or ruining the warranty. i would suggest starting small cuz these cars are already monsters. i went with the Burger Motorsports JB4 Tuner for BMW G80 M3 which is like $600-$700 and gives a solid bump without a full ecu flash. it's pretty much the best bang for your buck imo.

also if you want that sound without spending $4k on a full exhaust, just grab a VRSF Single Midpipe for BMW G80 M3. it's around $500 and actually makes the car sound like it should've from the factory!! i'm always a bit cautious with aero stuff cuz cheap kits fit like crap, so maybe stick to the BMW M Performance Carbon Fiber Front Splitter if you can find a deal. i mean, definitely talk to a pro before doing anything too crazy tho... gl with the build!

Agreeing with the points about handling and stance first—there is no point in adding power if the car feels floaty. I've spent a ton of time researching the current G80 market, and you really have to weigh the 'name brand' tax against actual gains. Here are a couple of practical tips based on what I’ve seen working lately: * **Aero Tiering:** If you want a more aggressive look than the basic stuff, check out the Vorsteiner VRS Aero Front Spoiler for BMW G80 M3. The fitment is basically OEM and the carbon quality holds up way better than the cheaper overseas kits that tend to yellow after a few track days.
* **Intake Value:** Instead of just a drop-in filter, look at the MST Performance Cold Air Intake System for BMW G80 M3. It gives you almost the same induction sound as the high-end $3,000 systems but at a fraction of the cost. Also, just a heads up on the tuning side: if your build date is post-06/2020, you're looking at a Femto unlock for any real flash tuning, which adds a bit of logistics and cost to your Stage 1 plans (at least that's how it is for most of us).