[jahudso2]

Either email Brenspeed and have them email you a tune with your rear 02s turned on, or return both the intake and tune to stock. DO NOT DRIVE with your C&L intake and stock tune. The diameter of the C&L pipe is larger than stock so if you run that intake with the stock tune, then the MAF sensor thinks that there is less air entering the engine than there really is. This leans your car out which is not healthy for your engine. It takes longer to load the tune than it does to swap the intake, so you might as well take the intake off as well.