System for forming moulded meat products from a meat mass comprising - a mould comprising at least one mould cavity for forming a moulded meat product; - a meat supply pump for controllably supplying the meat mass via a meat supply channel; - an interface module for connecting the meat supply channel to the mould, wherein the interface module comprises - a tubular section (24, 25); - a meat supply opening configured to engage with the meat supply channel; - a meat delivery opening configured to deliver the meat mass from the interface module into the at least one mould cavity; - a rotatable drive shaft (30, 31) comprising a first end outside the tubular section, configured to engage with a drive means and a second end extending inside the tubular section; wherein the system further comprises an additive supply for controllably supplying an additive via an additive supply channel, and wherein the interface module further comprises an additive supply opening configured to engage with the additive supply channel, such that the additive supply channel is fluidly connectable to an additive distribution means for distributing the additive into the meat mass inside of the tubular section, characterized in that the additive distribution means comprise a tube extending from the additive supply opening and bifurcating into a plurality of end points, wherein the end points are distributed over the cross-section of the tubular section. - a mould comprising at least one mould cavity for forming a moulded meat product; - a meat supply pump for controllably supplying the meat mass via a meat supply channel; - an interface module for connecting the meat supply channel to the mould, wherein the interface module comprises - a tubular section (24, 25); - a meat supply opening configured to engage with the meat supply channel; - a meat delivery opening configured to deliver the meat mass from the interface module into the at least one mould cavity; - a rotatable drive shaft (30, 31) comprising a first end outside the tubular section, configured to engage with a drive means and a second end extending inside the tubular section; - a tubular section (24, 25); - a meat supply opening configured to engage with the meat supply channel; - a meat delivery opening configured to deliver the meat mass from the interface module into the at least one mould cavity; - a rotatable drive shaft (30, 31) comprising a first end outside the tubular section, configured to engage with a drive means and a second end extending inside the tubular section; wherein the system further comprises an additive supply for controllably supplying an additive via an additive supply channel, and wherein the interface module further comprises an additive supply opening configured to engage with the additive supply channel, such that the additive supply channel is fluidly connectable to an additive distribution means for distributing the additive into the meat mass inside of the tubular section, characterized in that the additive distribution means comprise a tube extending from the additive supply opening and bifurcating into a plurality of end points, wherein the end points are distributed over the cross-section of the tubular section.