The best exhaust for a WRX is the one that is 3" or larger but has excellent fitment under the chassis while maintaining ground clearance, completely catless while still passing visual and sniffer emissions testing with C.A.R.B. exemption order number (for CA cars), has a nice sound that everybody likes under full throttle while never attracting attention of law enforcement, allows engine to make maximum peak hp and widest torque band, available in both polished stainless steel or titanium and with or without heat insulating coating, and all this for a cost below $500.

Unfortunately, I have yet to find such an exhaust.

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0==WW==0
"…axles of evil…" - george w. bush

 

^^Haha if you do come across such an exhaust, shoot me a pm asap. Or, I'm sure we could get a group buy together...I bet EVERYONE on i-club would want one of those. Maybe we could get it down to $25 a pop if we had 30,000 commited people.