2021 Official IMSA Spotter Guide

Latest Guide: 2021 Motul Petit Le Mans
Latest update:  v1d – Saturday 13th November (IWSC: TBD’s replaced for #38, #42, #70, updated liveries for #7 and #18. #01 Bamber in for Magnussen)

Welcome to the home of the Official 2021 IMSA Spotter Guide series. This page will be updated throughout the season prior to each event in the 2021 MSA WeatherTech SportsCar Championship and IMSA Michelin Pilot SportsCar Challenge series.

Version 1 of the guide for the Motul Petit Le Mans an the Fox Factory 120 at Michelin Raceway Road Atlanta (link) has been released and will be updated throughout the week with any changes.

As the season finale, we have the full roster of classes with 43 cars entrered in the main event including the final race for the GTLM Spec racecars and 40 GT4 and TCR race cars racing in the Michelin Pilot Challenge.

If you are attending the race, a printed booklet will be available at the circuit. Indycar also has their own Spotter Guide which will be available later in the week in the Race Details section.

Thanks to IMSA for partnering with the guide. If you have found the guide useful, please feel free to thank IMSA on Twitter. Without their support, there would be no guide. Thanks to all the teams who have helped with creating the guide.

Almost every team assisted again during this very challenging year! Also, special thanks to Shea Adam and Paul Marquardt for their awesome proof-reading skills for this initial guide.

Thank you to the fans, corner workers and media who have continued to support the Spotter Guides over the years. Your support, particularly this year has been massively appreciated.

Thank you for your support during 2021. If you enjoyed the guides, let IMSA know 😉


NOTE: Please feel free to share the guide on Social Media, but PLEASE LINK TO THIS PAGE and not the guide (as file names change with updates, particularly with the month change this week) so your friends and fans can download the latest version of the guide! I can also track data easier which in turn helps my quest for sponsorship


Previous guides:

  1. Rolex 24 at Daytona
  2. 12Hr of Sebring
  3. Mid Ohio
  4. Detroit
  5. Watkins Glen 6hrs
  6. Watkins Glen 240
  7. Lime Rock Park
  8. Road America
  9. Laguna Seca
  10. Long Beach
  11. ViR

COPYRIGHT 2021– This Spotter Guide, layout and illustrations are copyright Andy Blackmore. The guide may not be modified or passed on in any way without prior authority. The actual PDF may not be re-hosted on other websites and any links should link back to this Page. The guide and ALL illustrations may not be used independently without prior agreement from Andy Blackmore Design. ANY unauthorized usage will result in legal action!

The Online Spotter Guide is produced by Andy Blackmore Design. The Printed IMSA Race Day Viewing Guide available at selected circuits (dependent on public attendance) and is produced by IMSA, ISC and Andy Blackmore Design.