Kusaka Engineering RB26DETT Engine 1/6 scale model Skyline GT-R / BNR34

â– Manufacturer: Kusaka Engineering/KUSAKA ENG. â– Engine: RB26DETT. It was released in January 1998 (Heisei 10) with the concept of “the highest performance sports sedan for adults”. Not only did it simply reuse the 4-door body of the BCNR33 GT-R, but the rear doors and rear fenders were newly made to reproduce the blister fenders of the 2-door GT-R in the 4-door version.