I'm 'only' a customer of these guys, so am not speaking in any official capacity (and I nabbed the pic from their website,
www.kiwiracecars.co.nz). But I can vouch for them being great guys to yarn with about all things Cobra.
Neither the headrests nor hood vents are standard on their cars - they were custom made in house for this particular car (which is headed to Dubai). I'm sure if you emailed Colin at GBRC (aka kiwiracecars, address below) he'd be happy to answer any questions. Though don't distract him for too long from building my chassis
kiwiracecars@paradise.net.nz
Cheers,
Mark
Edit: Actually, I think that the seats may have been custom made by
Racetech seats (also in Wellington, NZ). These guys are the stock supplier of the seats for the GBRC Cobras, and I think Colin and Racetech may have collaborated to produce the headrests. But again, Colin would be the one to ask.