The perfect stance meets serious engineering. iE B9 lowering springs for Audi B9 A4 & S4 reduce body roll, dial out understeer, and deliver the exact drop your Audi has been waiting for. Tuned specifically for the Audi B9 and B9.5 chassis across A4 and S4.
The Science of Stance.
Your Audi deserves better than the 'lifted' factory look. We obsessed over the measurements to calculate a drop that doesn't just lower the car, it corrects it. By eliminating the factory reverse rake, we’ve achieved a flush, aggressive fender-to-tire fitment that looks right while retaining functional clearance for real-world driving.
Stay Flat. Stay Stuck.
Body roll is the enemy of grip. iE Performance Springs use carefully tuned rates that keep the chassis flat and composed through high-G corners, keeping the car glued to the pavement.
Goodbye, Understeer.
You’ll feel it in the very first turn. By rebalancing the front-to-rear spring rates, we sharpened turn-in and dialed down the understeer. Squat is minimized. Dive is controlled. The car simply goes where you point it, instantly.
Progressive Perfection
Performance shouldn’t punish you. Our progressive rate design remains compliant over road imperfections, then ramps stiffness under load. The result is confident body control without the bounce, crash, or harshness of poorly designed springs.
Set and Forget
These springs are built for owners who drive their cars. Engineered to work seamlessly with OEM dampers, Chrome Silicon alloy construction ensures sag-free, consistent performance for the long haul.
The Specs
Tech Specs
Drop — A4 S-Line
½ inch Front 1¼ inch Rear
Calibrated Sport Drop
Drop — A4
1⅛ inch Front 1¼ inch Rear
Calibrated Sport Drop
Drop — S4
1⅛ inch Front ⅞ inch Rear
Calibrated Sport Drop
Spring Rate
558 lbf/in Front 515 lbf/in Rear
Performance Progressive Rate
Material
High-Tensile Chrome Silicon Spring Steel
55CrSi alloy — sag-free for the long haul
Rate Design
Progressive Rate
Compliant over bumps, stiff under load
Damper Compatibility
OEM Dampers
Calibrated for factory shock longevity
Fitment
B9 & B9.5 A4, S4
Audi Drive Select compatible
Got Questions?
Frequently Asked Questions
Will these Audi B9 lowering springs work with my factory shocks?
Yes, IE springs are specifically calibrated to function with the stock B9 dampers, ensuring long damper life.
Do these B9 lowering springs affect Adaptive Suspension modes?
No. The springs are fully compatible with Audi Drive Select. Comfort mode remains compliant, while Dynamic mode becomes even sharper.
How aggressive is the drop on Audi B9 models?
Balanced and intentional. The ride height eliminates factory wheel gap and reverse rake without looking slammed or compromising daily usability.
Is this a performance spring or a cosmetic spring?
Performance. While we 'nailed the look,' the primary goal was chassis dynamics. The 55CrSi steel and increased spring rates are designed to reduce body roll, stop nose-dive during braking, and sharpen steering response.
Is the ride stiff?
It is firmer than stock, as intended for a performance application. However, the Progressive Rate design prevents it from being 'crashy.' You get a connected, sporty feel that communicates what the car is doing.
