H4REM is a modification for FH4 (Steam), attempting to overhaul the majority of the car roster available by virtue of making them competitive when squaring off against FH4's current roster of meta/off-meta cars, as well changing certain aspects of car upgrading.

Right now, only the VW Corrado has been fully overhauled, but you can expect more cars to be overhauled very SOON.

Version 1.0.0 Change Log (2025/05/30)

MAIN FEATURES:

- Corrected wrong engine cylinder notes of dozens of cars.
- Swapped engine notes of most cars.
- Better named engine swaps. This change will include year, manufacturer, displacement (liters only!), number of valves, valvetrain, engine configuration and number of cilinders.
++ 2.8L V6 -> 1995 VW 2.8L 12V SOHC VI6 (VW Corrado VR6)
- Certain car upgrades will increase less PI (Performance Index) of your car or none at all, freeing PI to spend on other aspects of your car's performance.
++ Anti-roll bar (no weight decrease, no PI change)
++ Brake (no weight decrease, less PI increase)
++ Suspension (no weight decrease, less PI increase)
++ Gearbox (no weight decrease, less PI increase)
++ Clutch (no weight decrease, less PI increase)
++ Flywheel (no weight decrease, less PI increase)
++ Restrictor (no weight decrease, less PI increase)
++ Rim model (no weight decrease/increase, no PI change)
++ Valve (no weight decrease, less PI change)
++ Piston (no weight decrease, less PI change)
- Increased customization of custom RWD/AWD swap
++ Fully customizable stock differential
++ Fully customizable stock gearbox:
===  10-speed for stock gearbox
===  7-speed for race gearbox
- The infamous Turbo Rally I4 has been reworked and will consume way less PI points when swapping into your car.
- Drivetrain swap no longer increases/decreases weight.
- ¹Reworked aerodynamics and handling of cars in an attempt to make them more competitive when facing off the existing FH4's meta/off-meta cars.
- ¹Stock engine upgrades reworked to be not weak to it's engine swap counterparts.
- ¹Improved rally suspension by raising it's maximum/minimum allowed ride height and decreasing compression height, making it much better at absorving bumpy offroad surfaces and actually decreasing PI.
- ¹Weight reduction upgrades no longer change weight distribution and center-of-gravity height, saving some PI.
- ¹Rollcage upgrades no longer increase weight and will greatly impact weight distribution of your car.
- ¹Reworked weight reduction upgrade values. Street and sport upgrades will decrease more weight.
- ¹Reworked forced induction upgrades to make more power on low-powered engines.
- ¹Intercooler upgrades will make more power to engines, especially on low-powered engines.
- ¹Oil cooling upgrades will decrease engines' weight.

¹VW Corrado only. Expect more cars to be reworked.

Many thanks to:

Doliman100 (GitHub):
- for ForzaTech Crypto Tool, enabling the decryption of "gamedbRC.slt" file.
Nenkai (GitHub)
- for DB Load Patcher, enabling the booting of FH4 with a decrypted and edited "gamedbRC.slt" file.
The people who created, worked on and currently work on DB Browser for SQLite
- for this freeware tool which makes database editing possible.

A few precautions you MUST take before playing this mod:
- Do not use this mod to set leaderboard records (Rivals, Horizon Story, Skill Zones, etc).
- it's okay to use this mod in Horizon Life's Free Roam and Forzathon Live.
- You can use this mod for competitive online racing (Online Adventure, Ranked Adventure, etc), but some people MIGHT notice you're using the mod when racing and report you.

REQUIREMENTS:

- Legal/non-pirated copy of Forza Horizon 4's Steam version (Ver. 1.478.564.0). No guarantees if it works on a pirated copy.
- Nenkai's FH4 DB Load Patcher 1.0.4 https://github.com/Nenkai/ForzaTools/releases/tag/fh4-db-1.0.4
- .NET 8.0 installed (required for DB Load Patcher!): https://dotnet.microsoft.com/en-us/download

HOW TO INSTALL THE MOD:

- Make sure you have the Steam version of FH4 installed.
- Download FH4 DB Load Patcher v1.0.4.
- Extract DB Load Patcher's two files (ForzaTools.FH4DBLoadPatcher.exe and ForzaTools.FH4DBLoadPatcher.pdb) inside the game's root folder ("...Steam\steamapps\common\ForzaHorizon4"). They MUST be placed in the same location of the game's executable (ForzaHorizon4.exe).
- Install .NET 8.0.
- Move the mod's 4 files inside the game's root folder and overwrite all the files when asked.

Backup\vanilla files are included in the mod's zip file in case you don't want to play the mod. Restoring the "gamedbRC.slt" is enough if you wish to play vanilla with the swapped car sounds.
- gamedbRC.slt ("...\Steam\steamapps\common\ForzaHorizon4\media\stripped\gamedbRC.slt")
- CarEngineEventMapping.xml ("...\Steam\steamapps\common\ForzaHorizon4\media\audio\cars\CarEngineEventMapping.xml")
- AudioGlobals.xml ("...\Steam\steamapps\common\ForzaHorizon4\media\audio\AudioGlobals.xml")
- AudioPassbyInfo.xml ("...\Steam\steamapps\common\ForzaHorizon4\media\audio\AudioPassbyInfo.xml")

HOW TO RUN THE MOD: 

There are four ways you can run "H4REM" using Nenkai's patcher.

- 1st: Create a shortcut to the patcher (ForzaTools.FH4DBLoadPatcher.exe) by copy and pasting it as a shortcut, then start the patcher through your recently created shortcut.
- 2nd: Just start the patcher (ForzaTools.FH4DBLoadPatcher.exe). The patcher will automatically boot the game and patch it with the edited DB file.
- 3rd: Drag the game's executable (ForzaHorizon4.exe) onto the patcher's executable (ForzaTools.FH4DBLoadPatcher.exe).
- 4th: Start the game from the executable (ForzaHorizon4.exe), then immediately start the patcher (ForzaTools.FH4DBLoadPatcher.exe).

 There's a rare chance the patcher will crash when attempting to boot FH4. In that case, just try it again.