Kulula Air (Johannesburg O.R. Tambo) is set to acquire a further four B737-800s after parent Comair (South Africa) (Johannesburg O.R. Tambo) secured financing from Investec Aviation Finance. The four aircraft, due in 2015, are part of an ongoing fleet renewal programme at kulula whose added fuel efficiency helped Comair boost its interim profits and revenue during its last Financial Year. kulula's fleet consists of two B737-400s and nine B737-800s.