The Tunnel is a collaborative album by American DJs Funkmaster Flex and Big Kap. It was released on December 7, 1999 via Def Jam Recordings. Recording sessions took place at Mirror Image Times Square, at Madison Square Garden, at Quad Recording Studios, at Chung King Studios, at The Hit Factory, at Electric Lady Studios, at Sound On Sound, at Sony Music Studios, at Soundtrack Recording Studios, at Battery Studios and at Big Noise Studios in New York City, at Criteria Studios in Miami, at Enterprise Studios in California, at Erick Sermon Studios in Long Island, and at Cash Money Studios in New Orleans.