i got a 2000 1.8t that doesnt have bose. i want to change the speakers all around. i got two components in the front and i dont know whats in the back. anyone know the size that fits in the speakers. people keep telling me different things, some say 5 1/4, some 6 1/2. i have no idea all i know is theyre components and ill need a 4 channel amplifier. thanks for any input.