Easiest solution, if you like how the Perrin looks and sounds, buy it! Get the resonated version to avoid the rasp, and if you want more volume, get a catted front pipe, or a header.
If you want rumble, which I see you mentioned, I would suggest the perrin 2.5" catted, then add an UEL header, (which is what gives you the rumble sound.) If you want a tiny bit louder, go catted, if you want substantially louder, go catless. Catless will introduce a bit of rasp.
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SOLD: 2015 WRB BRZ Limited ('02 WRX BBS, S-04's, Stoptech Sport pads, MXP SP, AVO drop in filter, Mishimoto Intake tube, decatted header, OFT 93 Stage 2 EL Tune, Kartboy rear shifter bushing, Whiteline transmission and subframe lockout bushings, ST Coilovers, SPC Camber bolts w/smaller crash bolt, SPC LCA's & SPC Toe Arm bushings, Red TOMs, TRD Wing.)
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