Supercars teams have struck early to secure co-drivers for the 2018 PIRTEK Enduro Cup, with the field taking shape well ahead of September's Sandown 500.
Few teams will have completely stable line-ups, thanks in part to the full-time driver shuffle that includes five rookies joining the field.
Matt Brabham is also set for his first enduro campaign having signed on to join Lee Holdsworth at Preston Hire Racing, replacing Karl Reindler.
Nissan Motorsport is another set for change, with MW Motorsport Super2 signings Garry Jacobson and Alex Rullo tipped to join its line-up alongside Andre Heimgartner and Simona De Silvestro respectively.
David Wall and Dean Fiore are, however, expected to be retained, with team co-owner Todd Kelly having declared no interest in co-driving after stepping back from full-time driving at the end of 2017.
Its Jamie Whincup/Paul Dumbrell and Craig Lowndes/Steven Richards pairings remain for a seventh and fifth year respectively.
Although yet to announce, Shell V-Power Racing, Walkinshaw Andretti United and Brad Jones Racing, with its two main entries, are understood to have opted for stability.
Plans for BJR’s third car, run as Tim Blanchard Racing, are unclear due to Todd Hazelwood’s main game move with Matt Stone Racing, which is also without a co-driver.
The obvious candidate for MSR is recently-retired full-timer Jason Bright, whose Racing Entitlements Contract is being utilised by the team this season.
MSR Super2 driver Bryce Fullwood is meanwhile among the next crop of young guns looking for a maiden enduro opportunity as he prepares to enter his fourth second-tier season.
23Red Racing is yet to confirm a partner for Will Davison, although his brother Alex is considered the most likely to secure the seat.
Tekno Autosports owner Jonathon Webb turned laps in his team’s new ZB last week but is again thought likely to wait until closer to Sandown to confirm his participation.
2018 PIRTEK Enduro Cup driver market summary
Confirmed
Red Bull Holden Racing Team Paul Dumbrell, Earl Bamber
Autobarn Lowndes Racing Steven Richards
Tickford Racing Dean Canto, David Russell, James Moffat, Steve Owen
Garry Rogers Motorsport Chris Pither, Richard Muscat
Erebus Motorsport Luke Youlden, Will Brown
Preston Hire Racing Matt Brabham
Expected
Shell V-Power Racing Tony D’Alberto, Alex Premat
Tekno Autosports Jonathon Webb
Nissan Motorsport Garry Jacobson, David Wall, Dean Fiore, Alex Rullo
Walkinshaw Andretti United Warren Luff, Jack Perkins