Does anybdy know where I could buy The HiPower Silent exhaust
made by HKS. It looks like the Hiper stainless steel but not sure
due to the b pipe being different...the SS using a resonator (glass pack style) vs the hiper that is non stainless steel. Thanks guys wanted to know because I am ready to buy the exhaust today.

 

the silent won't fit a US spec car without adjustments... the US bumper is slightly longer then the JDM bumper. I too was looking into this exhaust

 

Okay....I guess I toss that one out the window.....
which is quieter from the two the Stainless steel or the non
stainless HKS Hiper system?

 

they will sound the same... the stainless version is just a little bit lighter due to the metal used for the piping...

 

The HKS Silent doesn't need 'adjustments' per se, it appears a couple inches shorter than an US-spec exhaust because the US bumper bulges out more. It will fit, but it won't look the same as say, Buschur or Vishnu's exhaust.