The succeeding C210/211 and GC210/211 of 1977 continued to split the Skyline range into basic and six-cylinder models, the latter with a longer front end. This line continued through 1981. The Datsun C211 240K/280K and 240C/280C variants continued for export. A rare variant would be the wagon version, which had a unique styling treatment behind the rear doors, of a much smaller window than usual between the C and D pillars. The GT-EX replaced the GT-R with a turbocharged engine, the L20ET. This was the first turbo engine to power a Japanese production vehicle. One notable aspect of the turbo versions was that they were not intercooled and there was no form of blowoff valve, only an emergency pressure release valve.