REDLINE: tuning and conversion toolkit for Assetto Corsa EVO

Build › Convert from AC1 PRO

Bring your Assetto Corsa cars into EVO

Point REDLINE at your Assetto Corsa install or any mod folder, or drop in a .zip, .7z or .rar. Pick cars from the library and queue them. Each one converts in its own process: physics, sound, dash, driver and liveries.

The app estimates about two minutes a car. Every build is checked before it installs into the game’s mods folder, and if the game is running the install waits until you close it.

Filters in the search box: brand:ferrari class:gt3 year:>2010 status:converted
A report for every build: checks, warnings and limits, copyable as Markdown.
Encrypted cars (Custom Shaders Patch) are listed but never decrypted or converted.
Browsing the library and reading reports is free. Converting and installing need PRO.
Tracks: we can do them, and a track from the mods folder already loads in EVO in our tests. We’re waiting for Kunos’ own track pipeline so they go in properly, without patching the game’s content file. Why

What converts, what doesn’t

Build, Convert from AC1: an Assetto Corsa library with the McLaren P1 selected, its specs and readiness checks

Build › Convert liveries PRO

And the liveries you find later

Add an Assetto Corsa skin to a car you have already converted, without rebuilding the car. Pick the car, click the skin, done. The same page opens from Garage › Liveries › Add from AC1, or drop a folder of skins on the window.

A skin that repaints textures the converted car relies on is flagged as needing a rebuild instead of being added half right.

Build, Convert liveries: converted cars on the left, the Lamborghini Aventador SV's 34 Assetto Corsa skins on the right

Build › Convert from AC1 › In the game PRO

Everything the car came with comes across

The model is only the start. A converted car arrives in Assetto Corsa EVO the way Kunos’ own cars do. Every Assetto Corsa skin is a livery in the game’s car list under its own name. The spec sheet, brand badge, class and description are filled in from the car’s own files, and it stands in the game’s showroom like any stock car.

In REDLINE’s Livery Studio it gets a paint template with its own UV layout, its brand’s factory paints and a 3D preview, so you paint it the way you paint a stock car.

Driving: engine, turbo, gearbox, suspension, brakes, aero, DRS, ERS and electronics, converted to EVO’s units, and the car’s own engine sound when it ships one.
Cockpit: needles, digital displays as dash pages, LED lamps, mirrors, seatbelts and paddle shifters.
Around the car: its lights by day and night, cameras, animations, damage parts and a full level-of-detail chain.

What converts, what doesn’t

Assetto Corsa EVO's vehicle selection with the converted Lamborghini Aventador SV: its Assetto Corsa skins listed as trim levels, the Lamborghini badge, and the spec sheet with 700 PS, 593 Nm and 350 km/h — Every Assetto Corsa skin is a livery in the game’s car list, under its own name, with the car’s badge and spec sheet.

The converted Aventador SV in a teal livery in Assetto Corsa EVO's showroom hangar — Every Assetto Corsa skin is a livery in the game’s car list, under its own name, with the car’s badge and spec sheet.

Build › Tune a car

Reshape the torque curve and the boost, and watch the power follow

Drag the power and torque curve, set boost against RPM for each turbo (a twin-turbo car gets two editors, the wastegate its own), and adjust everything else from grouped sliders. A stock car is saved as a new car; your own builds are tuned in place.

Forced induction: keep the turbo, strip it to naturally aspirated, fit one to four, or copy one from another car.
Gearbox: RWD, FWD, 4WD or AWD layout, per-gear ratios, add or remove gears, final drive.
Setups: Garage › Setups edits real .carsetup files inside each car’s own limits.
Power & torque chart in the Garage, from the car’s data, with the stock curve overlaid.

Build, Tune a car: the Ferrari 296 GT3 power and torque curve and its boost curve

Build › Custom car

Or build a new car, eight steps

Base car, Engine, Forced induction, Drivetrain & gearbox, Tune, Sound, Identity, Review & build. The engine comes from a donor car, the sound can follow it, and the result is a new car in the mods folder with its own name. The car you started from is left as it was.

Builds export as small .rlbuild files: settings only, no game files.

Build, Custom car: the engine step, a BMW M4 GT3 Evo engine going into a Toyota GR86

Build › Compare · My builds

Put two cars side by side

Pick any two cars, stock or your own builds, and their figures line up row by row: power and torque, power to weight, weight, redline, turbos and boost, drivetrain and gearing, 0–100 km/h, top speed and the engine itself. The better figure in each row is marked, with the difference beside it.

My builds lists every car you have built or tuned, with Drive, Tune and Paint on each. Its menu renames a build and changes its brand, class and year, sets its preview picture, duplicates it, exports it as a small .rlbuild file, or deletes it with an undo. Back up all saves every build into one file, and Restore rebuilds any that are missing. Neither file carries game files.

Build, Compare: the Ferrari 296 GT3 against the BMW M4 GT3 Evo, 550 against 590 hp, 640 against 700 Nm, an 8000 against a 7000 rpm redline, two turbos against one

Drive

From the app straight into the car

Pick a car, a track and a session, race or practice, then press Launch. REDLINE starts Assetto Corsa EVO and puts you in the cockpit: no splash screen, no menus, and the driver the game’s own menu would have given you.

Other launchers start the game and then work through its menus for you, one screen at a time. REDLINE skips the menus entirely: press Launch and the next thing you see is the cockpit.

The whole session is on one form: track, layout and grip, the car or one of your saved cars, the setup it starts on, fuel, weather and time, session length or race format, and damage.

Setup: start on one of the setups the car ships with, or one you saved for it. You can still change it in the pits. AI cars keep their own.
Assists: automatic gearbox and clutch, throttle blip, ideal line, pit limiter, stability control, lights, wipers and the rest of the game’s list, each left to your game settings or set on or off for this session.
Electronics: only the levels the car you picked can adjust, such as traction control, ABS, engine map, boost or ERS, set before you leave the pits.
Weather detail: cloud cover, rain, track wetness, fog, humidity and wind gusts on top of the weather, temperature, wind and time of day.
Recent sessions: load any session you ran back into the form, or keep a form as a named setup with Save setup.
Needs the game closed and Steam running. Uses a small engine file that REDLINE downloads and checks against its signature before every launch.

Drive: a practice session at Brands Hatch GP in the Ferrari 296 GT3 on one of its shipped setups, the assists listed below, and the session summary beside Launch session

Drive › Race › Customise grid

Your own grid

Up to 14 AI drivers, each with their own car, first and last name, nationality, team, number and driver kit, and the three values the game’s AI reads: strength, aggression and consistency. Put yourself anywhere on the grid, move cars up and down, and save the grid to load again next time.

Only cars that can race as AI are offered. If a saved grid’s car can’t race any more, the launch leaves it out and tells you which.
The quick grid is still there: an AI count, strength and aggression, with every AI in your car or in other cars close to its pace.
No qualifying with AI yet. With AI on the grid the race starts straight away, in the order you set.

Custom grid: six AI drivers in GT3 cars from Audi, Ferrari, Porsche and BMW, each with a name, nationality, team, number, strength, aggression and consistency, and you starting fourth in the Ferrari 296 GT3

Garage

Every car you have, in one place

Stock, built, converted and installed cars in one grid, filtered by brand or by where they came from, each card with its class, power, weight and year. Saved shows the cars that have a saved car in the game’s garage.

A car’s page: its specifications, a power and torque chart, and your own stats with it from your telemetry: distance, hours, sessions, tracks, and when you first and last drove it.
Liveries and setups: the saved cars and liveries for it, and setups saved where the game’s own setup screen finds them.
From the page: Drive this car, Paint this car, Build from this car, Preview car in 3D, and List on the store for a car you can share.

Redline Studio — Garage

Online

From the server list straight onto the track

Every public Assetto Corsa EVO server is listed in the app with its track, session, player count and the cars it allows. Pick a server, pick a car and press Join. The game starts, connects and puts you in the pit lane with Drive ready, so you pull out when you want. On the way you see a REDLINE screen with the track and the steps of the join, not the game’s menus.

Other launchers get you online by working through the game’s own menus for you: start the game, open multiplayer, find the server in its list, pick the car, then watch each screen go past. REDLINE doesn’t click through anything. It asks the game for the server and the car directly, connects, and waits until the session is ready before it hands you the game’s pit lane screen. If the server says no, you get the reason in a sentence.

Only cars that will join. A server shows the cars you have installed that it allows. The game checks every car a server runs, not only yours, so a server running a mod you don’t have, or a different version of a car, says which one before you press Join.
Leaving works as in the game. The pause menu’s Exit, Back to pit and Drive behave the way they always do.
Refusals in plain words: a full server, a wrong password or a car the server doesn’t allow, on screen and in the app.
The game’s own checks stay on. Online, REDLINE’s tuning is switched off, so your car joins with its standard data. Needs Steam running and uses the same signed engine file as quick launch.

Online: the public server list with a busy Nordschleife Touristenfahrten server open, its track and outline, the Abarth 695 Biposto picked from the 68 cars you can join in, and Join

Online › Friends

Friends

Add a driver by their REDLINE handle. Once they accept, your list shows where each friend is right now (online, in the game, or on a server, with the server’s name, the track and the car) and what they last played. Press Join and REDLINE takes you to that server in their car, the same way as joining from the server list.

Joins from the game count too. REDLINE reads the game’s own log to see which server you are on, so friends see it however you joined.
When Join stops short. If you don’t have their car, the server opens for you to pick one. A server with a password asks for it first.
Your call. Turn off Show friends and crew where I am in Settings and you show as offline. Friends see your races only when Show my times publicly is on.
Requests both ways. Requests sent to you wait under Pending until you accept or decline. Removing a friend takes you off each other’s lists.

Online › Crews

Crews

A crew is a team that stays together: a name, a tag of two to five letters or digits, an owner and up to 50 members. Its page opens on who is on track now, grouped by server, with Join to drive with them.

A crew challenge. The owner picks a track and a car for a few days or a week. Everyone’s best lap on it fills a board with the gaps, and Drive it starts a session on that track in that car.
Crew records. The fastest lap anyone in the crew has set on each track, who holds it, in what car, and how far your own best is behind. Plus a line for the week: sessions, laps, drivers, the track and car driven most.
Open or invite-only. Anyone can join an open crew from the list. An invite-only crew takes a six-character code that its members can share.
The owner runs it. They can remove a member, change the description, switch between open and invite-only, or make a new code. If the owner leaves, the member who has been in the crew longest takes over.
One crew at a time. Leave one to join another. Races count on the crew page under the same Show my times publicly setting.

Livery Studio › Driver PRO

Your own driver, in any car

Give a driver a helmet, suit and gloves, then choose who wears them: you on the Drive page, or any AI on a custom grid. Each car dresses the driver on its own model: the game’s standard kit in stock cars, the car’s own Assetto Corsa driver in converted ones.

For each part pick colours, a ready-made design, or paint it. Colours go on the part’s own colour areas, the ones the game’s driver editor colours. The driver stands in 3D next to the editor and changes as you do.

Stock cars: three helmets and two pairs of gloves to choose from, and Kunos’ own kits: the Ferrari F2004 and SF-25 suits and helmets, and Sparco glove colours.
Converted Assetto Corsa cars: 284 designs read from your Assetto Corsa install, and colours applied the way Assetto Corsa colours its own drivers, so logos and seams stay.
A driver made for Assetto Corsa cars isn’t offered for stock cars. A car that brings a driver of its own keeps it.
Files: a driver lives in the game’s mods folder. The game’s own driver files are not touched, and a car with no driver chosen keeps its usual one.

Livery Studio, Driver: a new driver with a yellow and black Helmet 3, a navy and white suit and black gloves, standing in 3D beside the editor

Livery Studio › Driver › Paint PRO

Or paint the helmet yourself

Paint puts the part on the Livery Studio’s canvas, on its own template with the wireframe and UV panels, with the same brushes, shapes, text, images and layers as a car livery. The driver in 3D follows every stroke.

Converted cars wear one of four Assetto Corsa helmets: modern, 1985, 1975 or 1969. Paint one and REDLINE fits the painting to the other three, so your helmet shows in every car. Paint another one yourself if you want it to look different.

Livery Studio, Driver, Paint: the helmet's template painted yellow with a black band and a white pinstripe, and the helmet in 3D from behind showing the same band

Drive › Record telemetry · Session Studio

Every lap, laid out along the track

Set Record telemetry on the Drive form and the game writes a MoTeC log of the session. REDLINE splits it into laps on the game’s own lap beacons and draws each lap against distance round the circuit: speed, throttle and brake, steering, and the lap time at the cursor.

Compare laps: pick up to five, and a Delta lane shows the time gained or lost against the first, all the way round.
66 channels in each log. Add any of them, tyre temperatures or suspension travel, to the same distance axis.
Track position: a marker follows the cursor round the circuit’s centre line, on the ten circuits whose centre line ships with the game, Monza and Imola among them.
Per lap top and slowest speed, full throttle, peak lateral g and fuel; per session tyre pressures and temperatures, and brake temperatures.

Session Studio: a 1:32.457 lap of Brands Hatch in a Ferrari 296 GT3, speed, throttle and brake, and steering plotted against distance, with the cursor 8 seconds into the lap

Tracks · World Times

Every circuit, and the laps set on it

The Tracks tab lists every circuit in the game with its photo, region and layouts. A circuit’s page shows each layout with its outline, and the fastest laps REDLINE drivers have set there, with the car each one drove.

See full board opens World Times for that track: every lap on it, as each driver’s fastest or every attempt, narrowed by layout, car or class, or searched by driver or car. Sector times show where the lap recorded them, and a row opens to the lap’s details.

Who is on the boards: drivers with Show my times publicly on in Settings. Laps are sent after each session, and you can switch it off.
The weekly challenge has its own board, for this week or all time, with earlier weeks a click away.

Tracks: the Monza page with its photo, outline and GP layout, and its global times, a KTM X-Bow GT2 lap of 1:50.103 on top

Profile › Achievements

Your driving, read from your own telemetry

Profile adds up the MoTeC logs on your PC: distance and hours driven, cars and tracks, your most driven circuits, brands and classes, and your latest sessions. It is worked out on your PC from sessions recorded with Record telemetry on.

Achievements are 38 targets in six groups (speed, cornering, braking, craft, endurance and milestones) measured from what the logs recorded: top speed, cornering and braking g, how long you held full throttle, clean sessions, distance. Each shows how close you are, and the ones you pin show on Home.

Redline Studio — Profile

Store

Cars, liveries and setups from other drivers

Find something in the Store, press Install, and it goes into the right game folder. Packages are checked against their hash before they unpack. Publishing your own builds, liveries and setups works the same way.

Anything else can go in the manual lane: a .zip of up to 512 MB, listed as Manual install. REDLINE hosts it but does not check or install it for you.

Drivers too: a helmet, suit and gloves you made can be published, and installed, like a car, livery or setup.
New versions: a creator can put a new version on their listing, and everyone who installed it is told and can update from Downloads.
Share codes: paste an RL-XXXX-XXXX code or share link into the Store search.
Follow creators, rate and review, and see new uploads from people you follow.

Browse the Store on the web

Store: modded cars, liveries and setups to install

Also in the app

Weekly challenge

A car and a track each week on the Home page, with a leaderboard. Your laps are submitted after each session; you can turn that off in Settings.

Updates without a reinstall

New versions download inside the app, are checked against their signature and install in the background. No prompt, no setup window; the app reopens by itself.

When Assetto Corsa EVO updates

If a game update lands before REDLINE supports it, quick launch pauses and the game starts normally; everything else keeps working. Support arrives as a new signed engine file, with no app update needed.

Drag and drop

Drop an Assetto Corsa car folder, archive or folder of skins on the window. REDLINE works out what it is before offering to import it.

Your own brands

Build › Brands puts your cars under your own badge in the game’s car picker.

Backup & Recovery

Settings › Backup & Recovery saves the cars in your mods folder, built and converted, into one backup, and restores them with the game closed. Liveries made in the Livery Studio are not part of it.

Notifications

The bell lists messages from REDLINE, new versions of mods you installed from the Store, app updates and your latest telemetry. Delete them one at a time or clear the list.

Double-click to install

A .redlinecar, .redlinelivery, .redlinesetup or .redlinedriver file installs in REDLINE when you open it, and asks before replacing one you have. Switch it off under Settings › Online & privacy.

What REDLINE changes, and what it doesn’t

The game’s archive is never modified.: REDLINE reads content.kspkg and never writes to it or to the game’s executable. The Archive tab that browses it is read-only.
Your cars live in the mods folder.: Converted and built cars, and anything installed from the Store, go into the game’s mods folder under Saved Games\ACE. Setups go where the game keeps its own.
Modified cars join only servers that allow them.: Joining a server from the app changes nothing about what you drive there: REDLINE’s tuning is off online and the game’s own content check stays on. The game checks every car a server runs, so a converted, tuned or mod car can only join a server that allows it.

What PRO adds

Four things in the app need PRO. Everything else, including liveries you already have, is free.

Build, Convert from AC1: the Assetto Corsa library with the McLaren P1 selected

The Assetto Corsa converter

Converts cars from your Assetto Corsa install, a mod folder or an archive, with their physics, sound, dash, driver and liveries. Each build is checked before it goes into the game’s mods folder.

Build, Convert liveries: the Lamborghini Aventador SV's Assetto Corsa skins, ready to add

Assetto Corsa liveries on converted cars

Adds a skin you find later to a car you have already converted, without rebuilding the car.

Livery Studio

Paint on the car’s template in layers, with its factory paints and gloss, satin, matte, metallic or chrome finishes, and see it on the car in 3D as you go. Saving puts the livery on a car in your game garage and keeps the layers for next time. Its Driver tab dresses your driver the same way: helmet, suit and gloves.

The Studio’s Library stays free: assign a livery to one of your saved cars, share it as a file with the saved car it needs, make a grid pack for AI cars, or import a .zip or .acelivery pack. Opening a livery to paint it needs PRO.

Showroom

Garage › Preview car opens any car, converted ones included, in REDLINE’s own 3D viewer, built from the game files. Switch between its liveries and wheels, and try its lights, animations and cameras.

Free, with PRO for the converter and the Studio

REDLINE is free. You get a key from the app’s activation screen: pick a username, email optional. PRO adds the Assetto Corsa converter, the Livery Studio and the Showroom.

Feature	Free£0	PROStage 2 on Patreon
Build and tune
Custom car: engine swap, forced induction, gearbox, sound	✓	✓
Tune a car: sliders, power & torque curve, boost curve	✓	✓
Setup editor and power & torque chart	✓	✓
Compare cars, manage and back up your builds	✓	✓
Drive
Quick launch	✓	✓
Custom grid, starting setup, assists and electronics	✓	✓
Join online servers from the app	✓	✓
Friends and crews	✓	✓
Weekly challenge, track pages and World Times	✓	✓
Profile and achievements	✓	✓
MoTeC telemetry	✓	✓
Store
Install cars, liveries and setups	✓	✓
Publish your own	✓	✓
Assetto Corsa and liveries
Browse your Assetto Corsa library, read build reports	✓	✓
Convert, import and install Assetto Corsa cars	—	✓
Add Assetto Corsa liveries to converted cars	—	✓
Livery Studio › Library: assign, share and import liveries	✓	✓
Livery Studio: paint your own liveriesLiveries you already have, or install from the Store, stay free to use.	—	✓
Livery Studio › Driver: your driver’s helmet, suit and glovesWorn by you or any AI, in stock and converted cars.	—	✓
Showroom: a car in 3DGarage › Preview car	—	✓
	Download	Get PRO

How PRO works

Pledge Stage 2 (£5 a month) or Stage 3 on Patreon, then link Patreon in the app under Settings › License. PRO is added to your licence key once the pledge has been charged, and the app picks it up on its next check. Stage 1 supports the work but does not include PRO.

PRO belongs to your licence key, not to one PC. Cars you convert stay on your disk whatever happens to the pledge.

Download

One installer for 64-bit Windows. Version 1.3.5 · 5 October 2026.

Download for Windows

Windows may show a SmartScreen warning the first time; the download page says why and what to press.

What changed in 1.3.5

Start the game in VR (Settings > System), faster launches, REDLINE in Brazilian Portuguese, and weekly boards count a lap in the week it was driven.

Supporters

People who fund REDLINE on Patreon.

REDLINE