Top 10 Best Upgrades for Your BMW E9x
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The BMW E9x is one of the most modifiable platforms of its generation. Whether you're running an E90 320i as a daily driver or building an E92 M3 track weapon, the aftermarket is deep and the gains are real. Here are the 10 best upgrades you can make to your BMW E9x — ranked by impact, value and popularity.
1. Coilovers
Nothing transforms an E9x more completely than a set of coilovers. Adjustable ride height and damping let you dial in the perfect setup for road or track. The factory suspension is competent but conservative — coilovers unlock the chassis potential BMW engineered into the platform.
👉 Shop BMW E9x Suspension Upgrades
2. Performance Air Intake
A cold air intake is the most popular first mod for the E9x — and one of the best value upgrades available. Improved throttle response, a better engine note, and on the N54, real power gains. Easy to install, fully reversible.
👉 Shop BMW E9x Air Intakes
3. Cat-Back Exhaust System
The stock E9x exhaust is deliberately muted. A cat-back system gives your straight-six or V8 the sound it deserves — from a subtle improvement to full track aggression, depending on the system you choose.
👉 Shop BMW E9x Exhaust Systems
4. Polyurethane Suspension Bushings
Worn rubber bushings are the hidden enemy of E9x handling. Replacing them with polyurethane restores the steering precision and chassis feedback the car was designed to deliver. A must-do on any E9x with over 100,000km.
👉 Shop BMW E9x Bushings & Chassis
5. Front Lip Spoiler
One of the best visual upgrades for the money. A front lip adds aggression to the E9x's already sharp front end and provides a modest aerodynamic benefit at speed. Available in carbon fiber, polyurethane and ABS plastic.
👉 Shop BMW E9x Exterior & Aero
6. Rear Diffuser
The perfect complement to a front lip — a rear diffuser completes the aero package and gives the back of the car a purposeful, track-inspired look. Carbon fiber options are particularly popular on the E92.
👉 Shop BMW E9x Exterior & Aero
7. Carbon Fiber Interior Trim
The E9x interior is well-built but understated. Carbon fiber trim panels on the dashboard, centre console and door cards transform the cabin into something that feels genuinely special. Particularly effective on the E92 coupe.
👉 Shop BMW E9x Interior & Tech
8. Performance Brake Upgrade
If you're adding power or taking the car to track days, the brakes need to keep up. Upgraded brake pads and slotted rotors are the starting point — they improve bite, reduce fade and handle heat far better than OEM components.
👉 Shop BMW E9x Braking & Cooling
9. Anti-Roll Bar Upgrade
Reducing body roll is one of the most effective ways to sharpen the E9x's handling balance. Stiffer anti-roll bars work in combination with your suspension setup to reduce understeer and improve cornering confidence — especially on track.
👉 Shop BMW E9x Suspension Upgrades
10. Complete Suspension Kit
If you want to do it all in one go, a complete suspension kit bundles coilovers, bushings and anti-roll bar upgrades into a single, tested package. Better value than buying separately, and guaranteed to work together as a system.
👉 Shop BMW E9x Complete Kits & Bundles
Build Your E9x the Right Way
Every upgrade on this list has been personally tested by our team on our own E9x builds. We only sell parts we'd run ourselves — and we're always happy to advise on fitment, compatibility and build order.