iRacing Season 4 2026 News

With summer now firmly planted in the rear-view mirror, peak sim racing temperatures are now making themselves well and truly known. To celebrate this development, iRacing is bringing its Season 4 2026 update to the service, and with it a bunch of new and updated content.

It doesn’t end there either, as plenty of revised and further-tweaked features also come as part of the upcoming update. This Coach Dave Academy guide will run you through all the exciting new stuff you can enjoy from the moment the update drops. 

For those new to iRacing, check out Coach Dave Academy’s starter guide, as it could help quicken up the acclimatisation process considerably.   

Updated Tracks

In a somewhat unusual approach, the 2026 Season 4 build of iRacing will not feature any new tracks for racers to enjoy. Instead, the development team has decided to rebuild three American tracks from the ground up, ensuring they look and feel every bit as detailed and sharp as the latest circuits to be included in the service. 

The tracks to get this treatment are:

• Road America
• Mid Ohio Sports Car Course
• The Milwaukee Mile

All three venues have been built using up-to-date 2026 scans, ensuring they better reflect the current state of each track, since the previous versions were all built well north of 15 years ago. The Road America scan hasn’t been updated since 2008! 

While Mid Ohio will retain the same layouts, both Road America and Milwaukee get new ones. The former now has East and West variants that make use of the run-off road at Turn 5 for two extra courses to challenge yourself on, while Milwaukee’s road course layout will now also be available to use alongside the traditional oval. 

Happily, all three rebuilds will be included free of charge with the current packages, meaning everyone who owns the tracks will get the revised at no extra cost. The old builds will be retired as Legacy Content.

If you fancy spending some cash upon the release of the new build, Coach Dave Academy’s in-depth guide to the tracks currently included in the service is well worth a read. 

Track Refreshes

Alongside the rebuilt circuits, another few beloved American routes have been given art refreshes to ensure they look bang up to date in 2026. While these don’t include fresh rescans of the track surface itself, elements such as the background environment, curbs, and trackside objects have all been revised.  

The tracks that have been granted this treatment are:

• Road Atlanta (Every model, texture, tree, curb, surface, etc. has been rebuilt)
• Jefferson Circuit (Every model, texture, tree, curb, surface etc. has been rebuilt)
• Summit Point Raceway (Every model, texture, tree, curb, surface etc. has been rebuilt)

As usual with the environment refresh project, all of these enhancements will be added to the current track packages free of charge.

New Cars

While there are no new tracks arriving in iRacing for Season 4 2026, those who relish never-seen-before content can rest assured that some new vehicles are on the way to be enjoyed.

Firstly, the Aston Martin Valkyrie AMR-LMH will likely be one of the most popular additions to the game, as the British bruiser joins the current GTP ranks. The V12-powered monster currently competes in the IMSA Sports Car Championship and World Endurance Championship in their respective GTP and Hypercar categories, and now you’ll have another challenger to take on iRacing’s current roster of GTPs. Thanks to its amazing engine note, it’ll likely prove a very popular member of the GTP club.

In a British-themed update, the other new cars to join in 2026 S4 are a pair of Caterhams. Usually raced in the United Kingdom, Caterham racers tend to be found dicing in club-level racing competition, and their low-powered nature results in some of the closest racing you’ll ever find. Two versions of the car will arrive in iRacing: the Academy and 420R.

• The Academy has a lower-powered 130 hp 1.3-litre turbocharged inline-four engine mated to a six-speed manual gearbox. It also uses street-spec tyres and standard road-based suspension, and it’s aimed at less experienced racers
• The 420R gets a turbocharged 2.0-litre engine that pumps out 210 hp, which sends its power to the rear wheels through a slicker six-speed sequential transmission. It also gets full racing slicks and Bilstein racing suspension, and is thus aimed more towards those with more track experience

Both cars will be bundled together for one price, and will cover two different race classes. While the beginner-friendly Academy will be positioned at D Class competition, the 420R series will be placed at Class C level. 

Coach Dave Academy’s guide to the different cars and classes available within iRacing is a valuable resource if you’re not sure the sim will have the kind of machinery that gets you up in the morning. 

Additional Vehicle Updates

There will also be a range of revisions for cars already included in iRacing, some of which cover a selection of the most popular cars within the service. 

• Mazda MX-5: Completely re-engineered from the ground up (updated tyre model, new suspension build, engine and drivetrain revisions, damage and aero model also updated to 2026 spec)
• New Gen 4 Cup Car Version: Alongside the Gen 4 Cup Car, a new variant called the Grand National will be included within the same package, making it free of charge for those who already own the base Gen 4 Cup car. It’s got less power and is more agile than the standard machine, making carrying momentum a more crucial skill. Both vehicles have also had their drafting models revised
• Sprint Car Rebuild: Thorough revision of base car (Engine power increase, new tyre model, new suspension and braking systems, car brought to closely match 2026 rulebook)

All of these revisions will be added to each respective package for free, making this build a pretty cheap one for those who own the content. 

UI Tweaks

Following the recent roll-out of iRacing’s new UI system, 2026 S4 brings a range of enhancements for the new layout. 

• Pit Summary: Detailed illustration of expected pit stop time, damage information, and pit stall location so that you don’t overshoot in pressurised situations!
• Car Damage UI: A visual top-down 2D representation of your car showing which areas are damaged, and how badly
• Reference Car: Shows the braking, steering and throttle of the reference driver you’re taking on in modes like Time Attack and Time Trial, allowing you to compare yourself as you drive around the lap
• Quick Settings: Revised menu that replaces the old F9 black box, so it is now easier to use
• Gearshift Indicator: Gear indicator has been enhanced to better illustrate whether you nail or fail a shift
• Pinned Mode: Specific UI elements can be pinned on your screen when the rest of the HUD is hidden, allowing you to de-clutter your display and only have what elements are most important to you

Graphics

There are also changes from a graphical standpoint. iRacing has now updated its smoke, dirt, and particle system to utilise its all-new system. This means these effects will be thicker and more detailed than before, so be careful driving into a cloud caused by someone desperately trying to get going after a spin.

The weather system has also been treated to a minor revision, which is mainly to increase the likelihood of changeable weather conditions across the service. 

Other Updates

But wait, there’s more. iRacing has optimised the software’s core physics update loop, which has allowed for a considerable freeing up of CPU resources. An improvement of 50% can be expected across a range of hardware, which should allow most players to see a considerable increase in FPS and smoothness. 

These changes won’t be visible in single-car sessions, and will have the biggest effect in sessions with many cars included. This will make racing against large multi-class grids smoother than ever. Further improvements of this nature are currently in development.  

Speaking of multi-class grids, 2026 S4 will also debut a new multi-pace car system for race starts. Rather than having all the classes bunched up together like in the current build, each class will follow a dedicated pace car, which will run at differing speeds to help spread things out. This allows for a staggered starting procedure, reducing the chances of any first lap chaos. 

And just like that, we’re at the end of the improvements for the iRacing 2026 S4 build. With plenty of improvements being packed into this edition, iRacing continues to work hard to fend off growing threats like Le Mans Ultimate. It certainly isn’t lying down.