well in california anything that can read ur parameters, will void ur warranty. a pyro=void. anything that plugs into ur OBDII port is a void too. its very stupid and i dont agree with it but u can fight it. the only thing that wont void ur warranty in every other state other than cali is an intake. S&B makes a very good one and will cover damages due to the intake if the dealer wont. the S&B is not supposed to void ur warranty. it should come with a carb number if u live in the great state that says everything causes cancer (california)