All four South Island circuits will host a round of the 2021 Carters Tyres South Island Endurance Series.
The calendar, which is yet to be confirmed, will run from early September till mid-to-late October.
There will then be roughly a one-month break between the end of the season the New Zealand Endurance Championship, which will be hosted by the North Island Endurance Series.
2020 saw the South Island championship run a slightly reduced three-event schedule.
Teretonga played host to the opening round in September, with Ruapuna and Levels seeing out the season.
For 2021, Highlands Motorsport Park in Cromwell now re-joins the calendar after its role as the NZ Endurance Championship’s host circuit last year.
It means that for the first time since 2019, all four South Island circuits will host a round of the championship.
Also new to the series this year, MARC I and MARC II V8s are now eligible for competition.
Only one MARC car is currently in New Zealand – that being the Mustang-inspired MARC II V8 now operated by Collins Motorsport.
There is no confirmation on what class will open itself up to accommodate for the MARC cars. But team owner Paul Collins told Velocity News last year he believes the car should compete in GT B, the same class as the V8 SuperTourers.
Another additional rule change to the series has any FIA GT3 model automatically accepted into the championship.
Last year saw a healthy flock of top-flight GT3 machinery take to the grid, with the likes of Aston Martin, McLaren, Mercedes, Audi and Chevrolet all being represented at some point over the season.
Dates for the 2021 season and details on the New Zealand Endurance Championship, are expected to be confirmed soon.
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