were daytona style seats an option on Testarossa?
Aftermarket. They seem to still be available here: Ferrari Parts: Spares, Whole Cars, Wheels, Glass, Rubber, Suspension And More.
Worth merging this thread with the following? (no idea who I need to speak to about this) http://www.ferrarichat.com/forum/boxers-tr-m/411043-tr-daytona-seat-option.html
One-owner Testarossa with Daytona style seats coming to RM Sothebys Arizona 2016. I've asked Gordon for the lowdown on this car as I'm assuming it's non-original, but always happy to learn something new... https://twitter.com/Gord_Duff/status/646413289971392513
Well, I wouldn't say aftermarket--those appear to be standard TR seats that have had the Daytona inserts custom made--wouldn't be hard for an upholsterer, the seat pads come apart easily.
UPDATE: Confirmed by RM that the Daytona-style seat trim is non-original. Shame the original pads are no longer with the car, but as others have said, easy enough to put back to correct style. -Ed