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NEXT BUILD Season 4: September 2026
5 Confirmed
13 Likely
10 Small Chance
See It All Below โ†“
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  • iRacing multi-class race in Season 4, the type of large-grid session that benefits most from the Physics Islands CPU performance update

    iRacing Season 4 Adds Dedicated Pace Cars for Each Class

    iRacing Season 4 introduces dedicated pace cars per class and independent green flags for multi-class racing. Here is what changes and why it matters.

    Read More iRacing Season 4 Adds Dedicated Pace Cars for Each ClassContinue

  • iRacing MX-5 Cup cars racing door-to-door on track during Season 4

    iRacing Rebuilds the Mazda MX-5 for Season 4

    The Mazda MX-5 Season 4 update re-engineers the car’s suspension, engine, and tires from scratch. Here is what every MX-5 Cup driver needs to know before Season 4.

  • iRacing Season 4 HUD showing the new Pit Summary UI overlay on a race screen

    iRacing Season 4 UI Gets Pit Summary, Car Damage, and More

    iRacing Season 4 2026 adds six UI features: Pit Summary, Car Damage display, Reference Car for time trials, Quick Settings, Shifting Feedback, and Pinned Mode.

Up Next ยท Special Event

Knoxville Nationals

Knoxville Raceway ยท 410 Sprint Cars

Aug 4โ€“9

See Event Info โ†’ All Races & Events
  • iRacing Pavement Sprint Car Rebuilt for Season 4

    iRacing rebuilt the Pavement Sprint Car from scratch for Season 4. New power output, suspension geometry, a new tire model, and 2026 rulebook compliance all change how the car drives.

  • How Fixed Tires Work in iRacing IMSA GT3 Races

    Fixed tire races in iRacing’s IMSA GT3 series lock your tire selection and setup before the pit lane opens. If you come from open format, the way you approach each stint changes significantly.

  • 2026 eNASCAR Playoffs Preview: Zalenski Tops the Bracket

    The 2026 eNASCAR playoffs field is set. Ten drivers chase the Dale Earnhardt Jr. Cup across Michigan, Texas, and Kansas, with Bobby Zalenski carrying the No. 1 seed and Steven Wilson looking for a three-peat.

iRacing 2026 Season 4 Build Tracker

Everything we know for the next iRacing build.

🛠Next Build: Season 4 — September 202632 items tracked
12Confirmed
  • Aston Martin Valkyrie AMR-LMH S4 Confirmed:#cars#endurance#next-build#next-build-confirmed#confirmed
  • Gen 4 Grand National S4 Confirmed:#cars#nascar#next-build#next-build-confirmed#confirmed
  • Mazda MX-5 Physics Rework S4 Confirmed:#cars#physics#next-build#next-build-confirmed#confirmed
  • Pit Summary & Car Damage UI S4 Confirmed:#features#ui#next-build#next-build-confirmed#confirmed
  • Future Track Refreshes and Rescans#oval-tracks#next-build#next-build-confirmed#road-tracks#confirmed
  • Multiclass Starts S4 Confirmed (Race Control UPDATE 2):#features#next-build#next-build-confirmed#confirmed
  • Physics Islands: Multi-Threading Overhaul S4 Confirmed UPDATE 2:#physics#next-build#next-build-confirmed#confirmed
  • Caterham Academy & 420R S4 Confirmed UPDATE 3:#cars#next-build#next-build-confirmed#confirmed
  • Track Reverb & Reverb Zones#features#next-build#next-build-confirmed#confirmed
  • Circuit Bugatti#road-tracks#next-build#next-build-confirmed#confirmed
  • Aston Martin Vantage AMR-LMH (GTP)#cars#endurance#next-build#next-build-confirmed#confirmed
  • Bahrain International Circuit#road-tracks#next-build#next-build-confirmed#confirmed
10Likely
  • iRacing confirms Career Mode is coming! UPDATE 10:#features#career-mode#next-build#next-build-likely#confirmed
  • Summit Point Motorsports Park Refresh#road-tracks#next-build#next-build-likely#wip
  • New Helmet Model UPDATE:#features#next-build#next-build-likely#confirmed
  • Circuit Paul Ricard#road-tracks#next-build#next-build-likely#confirmed
  • Oval Rubber/Surface Behavior Updates#physics#next-build#next-build-likely#confirmed
  • Dirt Oval Improvements#features#next-build#next-build-likely#confirmed
  • GT3 Pit Stop Animation#features#next-build#next-build-likely#confirmed
  • Save Feature#features#next-build#next-build-likely#confirmed
  • Circuit Ricardo Tormo#road-tracks#next-build#next-build-likely#confirmed
  • Winchester Speedway#oval-tracks#next-build#next-build-likely#wip
10Small Chance
  • Spark: iRacing's New Graphics Engine UPDATE 3:#graphics#next-build#next-build-longshot#confirmed
  • IndyCar Street Courses UPDATE:#road-tracks#next-build#next-build-longshot#rumor
  • 128 Cars Per Session#features#next-build#next-build-longshot#future
  • NTMv10 Future Tire Model#physics#next-build#next-build-longshot#confirmed
  • Salem Speedway#oval-tracks#next-build#next-build-longshot#rumor
  • TT Circuit Assen#road-tracks#next-build#next-build-longshot#rumor
  • 2027 Mercedes AMG GT3 Coming to iRacing?#cars#gt3#next-build#next-build-longshot#rumor
  • Bowman Gray Stadium coming to iRacing? UPDATE 3:#oval-tracks#next-build#next-build-longshot#rumor
  • Kyalami Grand Prix Circuit#road-tracks#next-build#next-build-longshot#rumor
  • Croft Circuit#road-tracks#next-build#next-build-longshot#wip
Last updated: August 28, 2026
    View Full Build Tracker

    Inside iRacing

    • iRacing racing at Road Atlanta, a circuit that will benefit from the new night racing lighting engine

      Night Racing Is Coming to iRacing for the First Time

      iRacing’s new physically-based lighting engine enables night racing on fully lit tracks for the first time. The August 2026 development update confirms the project is nearing completion.

    • Aston Martin Valkyrie AMR-LMH racing in iRacing Season 4 2026

      Aston Martin Valkyrie AMR-LMH Confirmed for iRacing Season 4

      The Aston Martin Valkyrie AMR-LMH is confirmed for iRacing Season 4 2026, developed with real telemetry and engineering data from Aston Martin’s WEC racing team.

    • iRacing Career Mode Enters Final Polish with 7 Distinct Paths

      iRacing Career Mode is in final polish with seven distinct paths spanning grassroots to elite racing, all included free with standard membership and no extra purchases required.

    • How to Learn a New iRacing Track Faster

      Practice sessions on a new iRacing circuit should follow a structure, not just add laps. Here is a repeatable process for building braking references, fixing problem sections, and adding speed without random guessing.

    • Dirt track at Crandon International Raceway, venue of the iRacing Crandon Championship

      iRacing Crandon Championship 2026 Qualifying Open Now

    • NASCAR Gen 7 cars racing in iRacing before the 2026 superspeedway aero package update takes effect in the simulator

      iRacing Gen 7 Superspeedway Package: How the New Aero Works

    • Garrett Manes celebrates his first career eNASCAR Coca-Cola iRacing Championship Series win at Daytona International Speedway in 2026

      Garrett Manes Wins First Career eNASCAR Race at Daytona in Triple Overtime

    • iRacing trail braking in the Porsche GT3 Cup, controlling braking pressure through the corner entry

      Trail Braking and Brake Bias in iRacing

    • BMW M2 Cup cars racing side by side in iRacing, where subscription prices increased in August 2026

      iRacing Subscription Price Increase Takes Effect August 18

    More #InsideiRacing

    Speed & Strategy

    • iRacing car on circuit โ€” building pace through methodical track learning

      How to Display GT3 Tire Data on a Second Screen in iRacing

      GT3 cars in iRacing record tire temperatures, pressures, and wear every lap. Here is how to route that data to a second screen using SimHub and a GT3 DDU layout, so you can read it at a glance during any race.

    • iRacing trail braking in the Porsche GT3 Cup, controlling braking pressure through the corner entry

      Does Left Foot Braking Actually Make You Faster in iRacing?

      Left foot braking in iRacing gives you faster transitions and better trail braking control in paddle-shift cars. Here is how it works, which classes benefit most, and how to actually make the switch.

    • Track Impulse overlays in iRacing: two Porsche GT3 R cars racing side by side on track

      What a 6000-iRating Sportscar Coach Learned About Going Fast in iRacing

      Getting faster in iRacing takes more than seat time. Here’s what experienced sportscar drivers and coaches consistently teach about going fast in iRacing.

    More Speed & Strategy
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    Track Hub

    • Why Monza Can Be Chaos in iRacing

      Why Monza Can Be Chaos in iRacing

    • Surviving Monza in iRacing โ€“ A Practical Guide

      Surviving Monza in iRacing โ€“ A Practical Guide


    • Darlington Raceway: Screenshot Gallery

    • Watkins Glen International: Screenshot Gallery

    • Homestead-Miami Speedway: Screenshot Gallery

    Go to iRacing Track HUB

    Car Hub

    • Beginner Setup and Driving Tips for the Dirt Legends Ford ’34 Coupe

      Beginner Setup and Driving Tips for the Dirt Legends Ford ’34 Coupe

    • The Free Gem: Why the CTS-V is the Best Way to GT3

      The Free Gem: Why the CTS-V is the Best Way to GT3


    • The 488 GTE Legacy: Ferrariโ€™s Enduring iRacing Legend


    • Pro Mazda to Legacy: The Indy Pro 2000 Transition


    • Lucas Oil Off Road Trucks โ€” Screenshot Gallery


    Go to iRacing Car HUB
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    ICYMI

    • iRacing Season 4 Adds Dedicated Pace Cars for Each Class
    • iRacing Rebuilds the Mazda MX-5 for Season 4
    • iRacing Season 4 UI Gets Pit Summary, Car Damage, and More

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