Looking to put a catback on my 03 Protege LX. It's 2.0. Any ideas?

 

Greddy!! sickest exhaust on this planet if money isn't an option. if so look at mangaflow,flow master, borla, and hks

i have magnaflow on both my focus and protege. personally i think borla and hks sound kinda raspy
Magnaflow is a solid sound not to loud but depending on engine modifications that will determine your sound my focus is turbocharged running 250 Zex nitrious and it sounds solid but my mazda just has intake and it sounds about half way between solid and raspy.
It basicly all depends on what you have and where you want to go with it, i personally recomend magnaflow but i have heard great things from borla.

 

What do you think about racing beat? What model of Greddy? My Protege is basically stock too, except for a K&N cold air intake on it.

 

I have no personal experience w/the RB but have read that on the Protos, it's quite nice!
In general, RB makes nice, quality stuff... a little on the conservative side, but if that's what you're after....?
I on the other hand love (LOVE!!!) the Vibrant on my 3 series car and can also recommend that. https://www.mazdaforum.com/forum/intake-headers-exhaust-38/review-vibrant-exhaust-10374/

 

just get the greddy muffler and get your cat-back custom made you can go to any exhaust place and get it done i paid 200$ for mine but if you do go that way only go about .25-.50 inch's bigger you don't want to go to big because then your starting to lose back pressure and it starts to hurt your horse power. i have a 2.75 inch cat back on my protege, if your thinking about headers go with the long tubed ones don't get the shorty header you will get alot better airflow with the long tubes.
ive personally never heard of racing beat but virgin1 seems to know about them