cup_66 said:
i put the decat with silencer on 2 weeks before the system and it didnt make the car any louder whats so ever
A silenced de-cat with a std. system is not going to increase the noise that much, perhaps only at full boot. However, aftermarket exhaust systems will be louder than std. (apart from the stealth systems) and so adding the silenced de-cat onto an aftermarket system will be loud.
If you don't like the noise perhaps consider the following :-
1. Keep the Magnex system + buy a sports cat.
2. Keep the Magnex system + use the original cat.
3. Buy a Stealth system + use the de-cat.
But Magnex make good systems so I would be leaning towards option 1 if it was me personally.