A compressor comprising: a housing provided with an intake plate at one end and an end plate attached to an opposite end, wherein an inlet through which air can enter the housing is defined by the intake plate and an outlet to which compressed air is delivered is formed in the housing at a location between the intake plate and the end plate; a first rotor and a second rotor, the first rotor provided with a plurality of twisted lobes each having a leading edge and a trailing edge with respective channels formed between the adjacent lobes, the second rotor provided with a plurality of twisted lobes each having a leading edge and a trailing edge with respective channels formed between the adjacent lobes wherein both the first and the second rotors (18, 20) are rotatable within the housing with the lobes of the first rotor and the lobes of the second rotor configured to intermesh for a portion of a revolution of the first rotor such that rotating of the first and the second rotors (18, 20) transports a fluid from the inlet to the outlet; the outlet having a wall with a first portion and a second portion, characterized in that the said outlet further comprises a gap, the first portion of the wall having an edge that is parallel with a portion of the length of the lobe of the first rotor; the second portion of the wall having an edge that is parallel with a portion of the length of the lobe of the second rotor, and the gap being located in the wall at a position where the fluid being transported by the first rotor and the second rotor bleeds into the outlet through the gap before the trailing edge (60 or 70) of either rotor (18 or 20) passes the edge (60 or 70) respectively of the corresponding first and second wall portions (58 and 68), wherein the outlet is configured so that the trailing edge of one of the rotors (18 or 20) passes the edge (60 or 70) of its corresponding wall portion (58 or 68) before the trailing edge of the other rotor (20 or 18) passes the edge (70 or 60) of its corresponding wall portion (68 or 58). a housing provided with an intake plate at one end and an end plate attached to an opposite end, wherein an inlet through which air can enter the housing is defined by the intake plate and an outlet to which compressed air is delivered is formed in the housing at a location between the intake plate and the end plate; a first rotor and a second rotor, the first rotor provided with a plurality of twisted lobes each having a leading edge and a trailing edge with respective channels formed between the adjacent lobes, the second rotor provided with a plurality of twisted lobes each having a leading edge and a trailing edge with respective channels formed between the adjacent lobes wherein both the first and the second rotors (18, 20) are rotatable within the housing with the lobes of the first rotor and the lobes of the second rotor configured to intermesh for a portion of a revolution of the first rotor such that rotating of the first and the second rotors (18, 20) transports a fluid from the inlet to the outlet; the outlet having a wall with a first portion and a second portion, characterized in that the said outlet further comprises a gap, the first portion of the wall having an edge that is parallel with a portion of the length of the lobe of the first rotor; the second portion of the wall having an edge that is parallel with a portion of the length of the lobe of the second rotor, and the gap being located in the wall at a position where the fluid being transported by the first rotor and the second rotor bleeds into the outlet through the gap before the trailing edge (60 or 70) of either rotor (18 or 20) passes the edge (60 or 70) respectively of the corresponding first and second wall portions (58 and 68), wherein the outlet is configured so that the trailing edge of one of the rotors (18 or 20) passes the edge (60 or 70) of its corresponding wall portion (58 or 68) before the trailing edge of the other rotor (20 or 18) passes the edge (70 or 60) of its corresponding wall portion (68 or 58).