Get a JASMA Approved cat-back like Kakimoto, Fujitsubo or 5Zigen dude. Though the prices of jap exhausts had gone up due to the weak Aust$$, they r worth every penny, in terms of quality, they r mainly inconel coated and comes in stainless steel, optional titanium muffler, great mandrel bends, professionally welded, OEM fitment and they aren't noisy and droney like most mild steel Xforce shit.

U can get it at good prices with most jap aftermarket shops who bought stock before the economy took a plunge.

I'm only recommending this bcos nothing can ever beat the R&D those jap brands put into their work. Do remember, our cars are from there as well, who else knows best when it comes to performance?