Nevr understood that extra silencer, i had the HKS hi-power (non silent i think) on mine and it had the resonator...
Horrible exhaust, weighed as much as the car (exaggeration but not by much lol) the spoon full system was similar weight to the hks backbox.
Also hung the lowest of any exhaust i have had, so overall i dont rate them at all, but thats only me!