What sort of noise do these viper kits make? are thay loud or just like a normal airbox?
i am right in saying all cone filters make the 2ltr engine sound like a tractor??
i listened to a mates 2ltr calibra ecotec and he had a k&n fitted and it didnt make any tractor noise at idle, but i fitted a differnet make of induction kit to my astra 2ltr ecotec and it sounded bad on idle.
any help would be appreciated