NO CORPORATE FILTER

Your B9 A4 & A5 isn’t slow. Audi’s factory programming is holding it back. This iE tune safely reprograms the engine computer, stripping away those limits and replacing them with a new, unchained personality. Experience savage acceleration and custom-coded performance tech that makes your A4 & A5 unhinged when you want it, and civil when you don’t.

GAIN UP TO 424 HP

iE B9 A4 Tuning offers gains of up to 378 HP on stock turbo. Unlike inferior tunes, we deliver power without spikes, twitchy hesitation, or clunky surprises. Acceleration pulls hard, throttle response is exact, and driving behavior is perfected for everyday use. Sophisticated when cruising. Brutal when you floor it.

FAST, NOT RECKLESS

This isn’t a rushed, custom dyno file or a conservative one-size-fits-all tune. iE calibrations are developed over months and validated across real cars, climates, and driving conditions worldwide. Advanced safety logic and AutoProtect intelligent programming continuously monitor each cylinder and pull power instantly if something isn’t right. You get massive power and torque from a tune that dials it back when you need it most.

FULL POWER, NO EXCUSES

All 2021+ and some 2019-2020 A4 & A5 transmission computers are locked. While most tuners reduce output or force “low-torque files,” iE wrote custom engine ecu code to force the transmission to safely accept more torque. This custom code increases hydraulic pressures to increase clutch capacity without a transmission tune. Full power, no compromises.

CUSTOMIZE YOUR SOUND

Turn on Exhaust Crackles to give your Audi A4 attitude with dramatic pops and burbles on decel and shifts. Make instant changes from the app to turn it up, tone it down, or switch it off in real time. Kill the drone or free the beast by controlling your exhaust flaps from the app. The sound you want, exactly when you want it.

TRUEFLEX: E85 MADE EASY

Ethanol is like rocket fuel for your B9 A4, but using it shouldn’t feel like a science project. iE TrueFlex adds real flex-fuel intelligence, reading ethanol content and instantly optimizing boost, timing, and power to safely deliver maximum performance for the exact fuel in your tank. 91/93 pump gasoline, full E85, or any blend in between–. just fill and drive.

BUILD GUIDE

Your path from stock to the ultimate A4 or A5.

STAGE 1 — START HERE

Add up to +52 hp with nothing more than a Stage 1 ECU Tune, engineered to reprogram your stock engine for maximum gains on 91 or 93 octane. Pair with an intake for improved airflow and aggressive turbo sound. Available for 2017-2020 A4 & A5, the iE Transmission Tune transforms how the car shifts, accelerates, and delivers power, delivering a complete drivetrain performance upgrade.

INCLUDED WITH CORE, PRO, & APEX

STAGE 2 — TURN IT UP

To safely maximize the stock turbo, you’ll need an intake, intercooler, and downpipe. Reflash to Stage 2 and boost climbs to 378 hp. Increased airflow and cooling keep power consistent while acceleration pulls harder across the powerband. Pair with a catback exhaust to fully enjoy adjustable crackles.

Installation

Use the POWERlink Tuner and mobile app to retune your engine and unleash its full power.