WRX open down pipe dumped exhaust
removed the cat back Exhaust & dumping the downpipe under the car (no muffler) This is a stock internals ej205 2.0 liter wrx. for mod list and Dyno video go here: http://youtu.be/g-Hg_2m6LfI
sti HKS hi power exhaust
My 2006 STI. Good catless Exhaust sound, however, if you are looking for louder Exhaust do not get the hks hi power catback, there are two resonators that quiet it down slightly.