Anyone know the belt length for 87 Testarossa alternator?
There is a parts cross-reference thread on the 512/TR forum, shos the OEM # and Dayco number. You can plug the Dayco # into the Dayco site
Up to s/n 71447 it takes a "V" belt measuring 10x813, originally supplied by Continental. After that the serpentine belt is a 813K4 originally supplied by Pirelli (p/n 133262) and Continental (p/n 133294) but now supplied by Dayco under p/n 199820.