I just installed Turbo XS's 2.5 inch rear section RFL exhaust. This thing is the shizzle! I had an HKS Carbon TI, and enjoyed it, but was not pleased with the low end torque loss. I gained some power (on the butt dyno) in the upper RPM's, but was dissapointed with the loss of low end torque. After installing the turbo xs rear section I am extremely happy. This rear setion looks like the Carbon TI, sounds like it, but is louder, same boxer note, deep tone, blue torched tip, polished canister(offset). Now I know I am getting into the whole 2.5 VS. 3 inch debate, but I have great low end torque, and a stronger top end pull just from this rear section. It pulls to 6500+ like my HKS did. This thing is awesome. No need to reset ecu's, it worked from the get go. Just thought some of you who are on a budget or want to stay under warranty might want to know. I'll put some pics in later.

 

The majority of dealerships offer an axle back system made by SPT, and the cost is 700+ dollars. My dealer says that your warranty will not be voided if you stay with a cat back or less. According to the ferderal government legislation(magnusson-moss act) they can't void your warranty, period unless subaru can 100% prove that the part you put on caused a failure in the car, engine, transmission. I suggest doing a search, on the Magnusson-Moss act and show it to your dealer. There are many mod friendly dealers out there, as long as you don't remove any cats, or BOV's or new turbos etc. most dealers are great.