The G8X BMW lineup, Including G80 M3, G81 M3 Touring, G82 M4, and G83 M4 Convertible, has earned its spot as one of the most exciting performance platforms out there. With the twin-turbo S58 under the hood, sharp handling, and a design that looks mean from every angle, these cars are a blast right off the showroom floor.

That said, if you’re anything like us, stock doesn’t stay stock for long. A few smart upgrades can wake your car up in ways the factory tune just can’t touch, and unlock more power, better handling, and a look that’s all your own.

How Coilovers and Lowering Springs Improve Your G80’s Stance and Handling

BMW nailed the suspension tuning on the G80, but if you’re chasing a more aggressive stance or sharper cornering, coilovers or lowering springs open the door to a whole new level of control.

Quality coilover systems from brands like KW, Öhlins, and Bilstein let you dial in the setup to match your exact driving style. You can fine-tune:

• Ride height – typically dropping 0.5–2.0 inches for a lower center of gravity and better road presence.

• Compression and rebound damping – adjusting how the car reacts to bumps, dips, and weight transfer.

• Spring rates – so the suspension feels planted whether you’re daily driving or carving up backroads.

Our Coilover Recommendation:

KW 2021+ BMW M3 (G80) Sedan/ M4 (G82) Coupe 2WD Coilover Kit V3

For coilovers we recommend the KW V3 Coilover kit for its premium build, improved grip, and precise handling. With independent compression and rebound adjustments, it’s perfect for dialing in performance to your driving style!

Shop More G8X Coilover Options Here

Lowering springs offer a simpler, more budget-friendly way to close up that wheel gap and improve turn-in, while coilovers give you the flexibility to really perfect the ride and handling balance. Either way, the result is a G80 that looks meaner, corners flatter, and feels more connected to the road.

Our Spring Recomendation

H&R 21-22 BMW M3 Sedan/M3 Competition Sedan G80 Sport Spring (w/Adaptive Susp.)

We recommend the H&R Sport Springs for the '21–'22 BMW M3 G80 with adaptive suspension for their balance of style, performance and price. They lower your ride height for a more aggressive stance while enhancing handling without significantly compromising comfort.

For a quality upgrade without breaking the bank, a good set of springs is your best bet.

Shop More G8X Spring Options Here

The benefits extend beyond aesthetics. With the right setup, you'll experience:

• Reduced body roll through corners
• Improved turn-in response
• Better weight transfer during aggressive driving
• Elimination of unsightly wheel gap for a more purposeful stance

Pro Tip: After installing new suspension components, don't forget to get a professional alignment. This ensures optimal tire wear and handling characteristics.

Can a Performance Exhaust Unlock Power in Your G80?

BMW’s twin-turbo S58 is an incredible engine, but the stock exhaust keeps it a little too polite. Swapping to a quality aftermarket system lets you unlock the sound this car was meant to have — and makes every drive so much more engaging.

You’ve got a few solid routes to choose from:

• Cat-back systems from Akrapovič, Milltek, or AWE Tuning for a full transformation in tone and flow.

• Axle-back setups if you want a cleaner, more budget-friendly sound upgrade.

• Valved systems that let you cruise quietly or open it up with the press of a button.

A well-designed exhaust can shave pounds off the car, free up horsepower by reducing back pressure, improve thermal efficiency under load, and sharpen throttle response and turbo spool.

There’s nothing quite like hearing the S58 shift from a subtle growl to a full-throated roar. It's the kind of sound that tells everyone this isn’t just another M3, it’s your M3.

Our Exhaust Recommendation

Aeroflow Dynamics F1 Valved Exhaust System

For G80 M3 and G82 M4 owners, we’re big fans of the Aeroflow Dynamics F1 Valved Exhaust System. It’s built with premium materials like titanium, and delivers an aggressive race-inspired tone when you want it, and stays refined when you don’t. The valved design means you can cruise quietly around town, then open it up for a full throated sound at the push of a button.

Shop More G8X Exhaust Options Here

Why Lightweight Wheels Are the Ultimate Performance Upgrade for Your BMW

If you want a mod that delivers instant, seat-of-the-pants results, lightweight wheels are hard to beat. By reducing unsprung weight — the mass not supported by your suspension — you improve the way your BMW reacts to just about everything.

When you’re shopping for wheels, a few key things matter:

• Construction – Forged wheels from brands like HRE, BBS, or Vossen offer the best strength-to-weight ratio but come at a premium. Flow-formed wheels give you a nice middle ground between cost and performance.

• Sizing – Many G80 owners go for a staggered setup to enhance stance, like 19x9.5" front and 19x10.5" rear, or 20x9.5" / 20x10.5" for a more aggressive look.

• Offset – Get this right for perfect fitment and to avoid rubbing issues, especially on lowered cars.

Pair a quality set of wheels with high-performance tires like Continental ExtremeContact, Michelin Pilot Sport 4S, or Pirelli P Zero, and you’ll completely change both the look and feel of your M3 or M4.

Do Aero Upgrades Actually Add Performance To Your G8X?

The G80’s bold front end isn’t for everyone, but the right aero upgrades can pull the design together and give it a more purposeful, performance-driven look.

Brands like Aeroflow Dynamics and Autotecknic design complete kits specifically for the G80 platform, so you get perfect fitment and styling that works together across all components.

It’s not just about looks either, quality aero upgrades can reduce front-end lift at high speeds, improve cooling through better airflow management, and increase stability during aggressive cornering, making them a great way to personalize your M3 whether you’re aiming for a clean, subtle style or a full track-inspired setup with real performance gains.

Our Top Aero Recommendations 

Aeroflow Dynamics GT1 Front Lip V1

We recommend the Aeroflow Dynamics GT1 Front Lip V1 for the 2021–2024 BMW G80, G82, and G83 M3/M4 for its aggressive styling, durable hybrid poly construction, and perfect fitment.

AutoTecknic Dry Carbon Roof Spoiler (Touring)

For the G80 M3 Touring models recommend the AutoTecknic Dry Carbon Roof Spoiler Add-On for its sleek, lightweight design and OEM-quality fit.

AutoTecknic Dry Carbon Front Bumper Lower Vent Set

For a cosmetic upgrade we recommend the AutoTecknic Dry Carbon Front Bumper Lower Vent Set for the G80 M3 and G82/G83 M4. Its premium twill-weave construction looks great and offers weight savings with precise OEM fitment.

Find More G8X Exterior Accessories Here

Tuning: Unlock Your BMW’s Full Performance Potential

BMW’s S58 engine is a beast, but it’s held back from the factory with a conservative tune. That means there’s a lot of untapped power just waiting to be unlocked — and an ECU tune is one of the most dramatic ways to transform your G80 M3 or G82 M4.

Top tuners like aFe, ESS, and Bootmod3 offer options such as flash tunes that replace the factory ECU programming, piggyback systems that adjust sensor data for more power, and multi-stage tunes that let you switch between different power levels on the fly. 

With a quality tune, you can expect gains of 80–100 horsepower, over 100 lb-ft of torque, sharper throttle response, removed speed limiters, and custom features like enhanced burbles or no-lift shifting.

The key is choosing a tuner who prioritizes reliability and safety over headline power numbers. A good tune should work in harmony with the rest of your setup, not push your car to the ragged edge.

For the best results, pair your tune with supporting mods like a high-flow intake, upgraded intercooler, and downpipes (for off-road use). Done right, a tuned G80 can run with — and often outrun — supercars that cost twice as much, especially in real-world conditions.

Our Tuning Recommendation

aFe POWER SCORCHER BLUE

The aFe POWER SCORCHER BLUE Power Module boosts horsepower, torque, and drivability with plug-and-play installation, four programmable power modes, and Bluetooth control via a smartphone app.

Find More G8X Tuning Upgrades Here

Custom Touches: The Finishing Touch for Your Ultimate BMW

Big performance mods can change the way your G80 drives, but it’s the small details that make it yours. High-quality titanium hardware and custom pieces add a level of detail that takes your build from impressive to unforgettable.

Premium titanium parts and anodized hardware bring unique benefits:

• Distinctive color accents that tie into your car’s overall theme.

• Weight savings over standard steel fasteners.

• Exceptional corrosion resistance for long-term durability.

• Custom laser engraving for one-off personalization.

From complete engine bay dress-up kits to custom valve stem caps, our precision-crafted components show that you care about every inch of your build. It’s that extra attention to detail that sets your M3 or M4 apart from the rest and makes it a true reflection of your style.

Our Top Customization Recommendation

JDC Titanium Engine Bay Dress-Up Hardware Kit (G8X Stage 2)

The Stage 2 JDC Titanium Engine Bay Dress-Up Hardware Kit is the most complete titanium upgrade for the BMW G8X M3/M4 on the market, replacing factory hardware and pop clips with lightweight, corrosion-proof Grade 5 titanium.

CNC machined, hand-polished, and available in custom anodized colors, this kit delivers both show-quality looks and lasting performance. With multiple stage options and hardware designed to fit the specialty Dinan strut braces, this kit is the ultimate blend of style, durability, and customization for your engine bay!

Pro Tip: Customize high-visibility areas like the engine bay, wheel hardware, and interior accent points where these details will be most appreciated.

Shop More G80 M3 Dress-Up Parts Here

Building Your Ultimate G80

The G80 platform is a great canvas for personalization, and every upgrade, moves you closer to your vision of the ultimate M3 or M4. The best builds aren’t rushed; they’re planned with purpose, pairing parts that work in harmony and choosing quality over compromise.

If you’re ready to start shaping your BMW into something truly your own, focus on the upgrades that excite you most and build from there. Each step brings you closer to a car that’s faster, sharper, and unmistakably yours.

When you’re ready to bring those ideas to life, JDC is here to help with the parts, and expertise to make it happen!