The next iteration of Porsche’s first Motorsport division-developed Cayman, the GT4 has been spotted again, here running road trials. The car seen here could be a development of the one wearing the body of the discontinued Cayman GT4 which was seen circuit-testing last year, and that car was thought to employ a version of the naturally aspirated 4.0 litre flat-six found in the 911 GT3 and GT3 RS.

This powerplant is expected to output somewhere north of the 400 hp mark, placing it comfortably in between the 385 hp of the old Cayman GT4 and the 500 hp of the facelifted 911 GT3. As par for the Porsche GT division course, drive is sent to the rear wheels via a limited-slip differential. Our sources note that a six-speed manual has been confirmed, as is the case with a dual-clutch automatic.

Porsche’s current design language for its more potent models is visible here at the GT4’s sharp end, with a front bumper that wears a more square-cut set of intakes at each corner, with revised DRLs. The headlamps are now updated to be in line with those on the rest of the 718 range, with its tail lamps following suit. This Cayman GT4 will also gain an enlarged rear wing, in line with the larger aerofoils on GT-series 911s.

The rump of this development vehicle also appears to be a departure from the familiar norm of centrally-mounted exhaust exits; a pair of separate exhaust mufflers feature here instead. Here, rolling stock appears to be 20-inch alloys with the standard five-lug hubs, as opposed to the centre-locking units on the GT-series 911s. Carbon-ceramic brakes can be expected to be optional.

Though not clearly visible, the interior of the updated Cayman GT4 will likely remain similar to those of the current 718 range, albeit with the lightweight bucket seats as available in the GT3 RS, along with a generous serving of Alcantara trim.

Given its Motorsport division origins, this Cayman looks set to be another collectible. It will be the crown jewel of the Cayman range, possibly spawning a similarly-powered Boxster but with select differences. Considering its relatively uncovered bodywork, the Cayman GT4 could be making its debut later this year, though likely with a variation on its name. Revival of the Cayman R, perhaps?