My setup is dc jdm 4-1, Random tech high flow cat and apexi n1 cat back with silencer. My advice to you would be get a high flow cat, and it doesn't matter what you get for exaust, if its not silenced its loud especially with 2.5 inch od on itr. my car pulls harder now than i expected just with that basic setup. mugen, comptech are quiet and effective but will u spend a $G for it,I wouldn't.