Sounds like a group called El Nuevo Xol.
it is a chicano rap or in other words mexican/latino rap
Gerardo
Episode 3
Season 16, episode 9 - "Pranksta Rap"
S16|E09 Pranksta Rap
season 2 episode 22
Pranksta rap
Season 7 "It's Tricky"
It is in season 2, Episode is called Five of a Kind... it's the last scene of the episode.
The rap song in the first episode of Season 5 of Californication could possibly be Act Like You Want It. This song is by rapper X5 featuring Mr. Fang.
Season 6, from the episode McStroke
I personally prefer Rasta but im a metal head sober so i doubt i have the same taste as you