Yes only late models. It became available at the same time as the 16145 was sold with a 16 speed transmission like the smaller models (the first gear was left out for the 16045 and 16145 because the torque on the transmission would be too high: In the 16145 with 40k box, they had an overdrive gear acting as the 4th speed, where the ratios of former gear 2 3 and 4 acted as gear 1 2 and 3)
However there are plenty of examples of 12145;s fitted with an aftermarket turbo, which did fine at 158 PTO hp.