The purpose of the TurMMAC Afterbody Application Challenge is to validate current turbulence models and their ability to correctly predict the complex afterbody base flow with a propulsive jet. The flow regime includes such phenomena as separation, shock boundary-layer interaction, jet-shear layer interaction, mixing and jet spreading. Nine turbulence models have been tested on five different cases of jet pressure ratio. Three partners, FOI, QinetiQ and BAE SYSTEMS, have each contributed with separate investigations using the available in-house code and turbulence models. The CFD results have been compared to experimental data from FOI. This report presents the result in the form of general flowfield of Mach contours, surface and base pressure, separation point, boundary layer pressure and velocity, u- and v-velocity profiles, turbulent kinetic energy, Reynolds uv-stress and temperature profiles above and behind the afterbody. The influence of the turbulence model was found to be significant even if some consistency between CFD-codes could be found. The Kok TNT model produced the most consistent results which also compared well with the experimental data. Kok TNT with EARSM was the only model that gave reasonable velocity profiles in the separated region.