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IMSA Confirm Separate BoP For GTD Pro in 2022

IMSA has announced the outline details of the regulations that will shape their new-for-2022 GTD Pro class, replacing the current GTLM class (for GTE-spec cars) with an all-Pro-driven, GTD Pro class (for GT3-spec cars, in addition to the current (Pro-Am) GTD class.

The key determinant between he two classes is set to be a separately managed Balance of Performance, likely to see a significant performance gap between the two classes.

“It was important that we worked in lockstep with our manufacturers and tire partner to develop the GTD PRO ruleset,” said IMSA President John Doonan. “Our IMSA technical team was thorough in its analysis and the end result allows us to chart a successful course for the future of factory-supported GT racing in GTD PRO as opposed to the customer racing nature of the GTD class. Ultimately, the market will speak as manufacturers confirm plans to participate, but we are very optimistic that we will have strong fields in both GTD PRO and GTD starting next year.”

In further comments to’s Marshall Pruett the IMSA President made it clear that there are a number of ongoing conversations, and some pending announcements leading to a hoped-for 8-10 GTD Pro cars and a similar number of GTD takers – You can read Marshall’s article/ interview Here

Chevrolet, initially at least with a performance balanced version of their GTLM C8.R, BMW, with the new-for 2022 M4 GT3, and Lexus are understood to be amongst the early takers for GTD Pro.

Common Tyres and Fuel For 2022 between GTD and GTD Pro

Both classes will use the single-specification Michelin S9M tire currently used in the GTD class.

The intention is that this will, along with the use of the shared FIA-GT3 platform, reduce development costs for both manufacturers and customer teams.

IMSA and Michelin will announce a longer-term solution for 2023 and beyond at a later date.

Both classes will use the same, spec VP racing fuel.

GTD PRO/GTD Balance of Performance (BoP)

GTD Pro will have a different BoP to the Pro-Am GTD class, a not unexpected measure to ensure class separation.

Both though will use the same, data-driven Balance of Performance (BoP) process, an extension of IMSA’s current process.

Sporting Regulations

GTD PRO will adopt current GTLM Sporting Regulations on driver ratings, qualifying, grid placement and race procedures.

GTD PRO cars will use red number panels and position-indicator LEDs.

GTD PRO cars will be required to start the race on qualifying tires or face a penalty as opposed to GTLM, which allowed teams to use any tires from their allocation without penalty.

GTD will remain as it is today with the same requirements for Bronze or Silver-rated drivers to be included in team lineups, qualifying, grid placement and race procedures.

The same qualifying procedures introduced in 2021 which require a Bronze or Silver-rated driver to set the team’s starting position followed by a mandatory driver change and a second qualifying session to earn qualifying points will remain in effect.

GTD PRO will adopt the same testing limitations as the existing GTLM class, which allows for eight days of testing. The GTD class will continue to be capped at four days, although Bronze drivers may have unrestricted test days with IMSA approval.

Wind tunnel and straight-line testing is prohibited in GTD.