catback exhaust

TNT Catback system H&R lowing kit 18" Yokohama TSW rims (naughty)

hey guys, i know this might sound stupid but i ordered my catback for my Mazda 3s. And now my catalytic converter is clogged and is messing my cylinders up. If i straight pipe it can i still install by "catback" or would i have to go with an aftermarket muffler. Thanks guys. Kind of a newbie.

I have a stock 2008 Mazdaspeed 3 Cat back exhaust for sale im trying to get rid of nothing is wrong with it at all would rather have Local pick up than ship $135 local pick up $150 + SHIPPING. Also willing to do trades -BOV -Downpipe -any thing equivelent in price ...Sorry the sign is...

As the title says looking for a cat back exhaust, not to concerned with brand mostly price, looking for the best deal out there however the corksport or HKS would be great. Would also consider a catted downpipe if the price is right. Basically got some money to spend and looking to buy...

i'm looking for a bov and catback...but kinda tight in cash so anybody know any places that sells catbacks for a decent price...and bov, i don't know which kind to get....lmk..thanks...

Hi , I'm currently in the market for a spare fs-de whole engine preferably in a great working condition, or semi TLC needed. im planning on building a bullet proof engine as a project, to replace god forbid! my current one if need be. i also need a spare transmission also in great condition...