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The 2025 National Sports Sedan Series, known as the Precision National Sports Sedan Reason after its title sponsor, was a motor racing series for Australian sports sedans. The series has very relaxed regulations allowing a broad range of custom-built racing cars to participate, with the proviso that they have bodywork resembling a road car. A national competition for sports sedans dates to 1976, and the present series to 2004.
The series was sanctioned by Motorsport Australia, and its naming rights sponsor is Precision International, a supplier of specialty parts for racing engines.
The five-round series consisted of four rounds as part of the Trophy Tour, a new series of motor racing events organised by local clubs, racing circuits, and coordinated by Motorsport Australia, [1] and a single round supporting the GT World Challenge Australia category organised by SRO Motorsports Group. [2]
| Round | Circuit | Dates | Supporting | Map |
|---|---|---|---|---|
| 1 | | 21–23 March | Motorsport Australia Trophy Tour | |
| 2 | | 30 May—1 June | Shannons SpeedSeries | |
| 3 | | 22–24 August | Trico Victorian State Circuit Racing Championship | |
| 4 | | 25–26 October | The Bend Classic | |
| 5 | | 21–23 November | Island Magic | |