dat's a good way to silence things down... but wat u'll also be doing is,
drastically reducing the amount of air dat's coming out from yer 3" exhaust..
so basically, u can say it defeats the purpose of putting a 3" piping +
exhaust in d first place....
the other alternatives are (which are less restrictive):
1> install a center box
2> re-fibre your exhaust
The rear bolt on silencer tip is a good and effective way, if u do not
mind the reduce in power output.
Here are some exhaust shop contacts:
1> Sunway : JFA exhausts : Jafar - 0122006235
2> Segambut : Robert's Exhaust : 0192600693