Tenzo Type R exhaust on my civic, tends to be very raspy at certain RPM's, anyone know what i could do to make it more smooth or should i buy a new exhaust

also, does anyone have a silencer for this exhaust or know where i could get one?

 

No offense, but i woulndt buy a tenzo exhaust in the first place. If it sounds raspy, the best you could do is take out the cat and add a test pipe, but chances are thats illegal. Your best c hoice is to just buy a new exhaust, or maybe just the muffler and use your existing piping and just ahve it welded on somewhere. That would be a cheaper alternative