Complex sentence: For this reason, Nissan purchased the 86G-7 chassis back from the Hasemi Motorsports team and purchased the 86G-5 chassis from the Hoshino Racing Team and rebranded the two cars as Nissan R88C's and entered them in the 1989 JSPC Championship.
Split into simpler sentences: For this reason, Nissan purchased the 86G-5 chassis from the Hoshino Racing Team and purchased the 86G-7 chassis back from the Hasemi Motorsports team. The two cars were rebranded as Nissan R88C's and entered them in the 1989 JSPC Championship.