i told the guy umm the one's under the car lol.. but crazy they wanted $350 for used cat each

and tecn1k the computer i used just tell you what is wrong does not give you codes the computer just told me catalytic converter bank 1

Purchase Schnitzer sport 'cats'! They are about 200euros! May be less!

$200 Euros so like $350 Canadian or maybe more our dollar is pretty low lol.. where can i find this cats?

I like shop Schmiedmann - Styling/Tuning/Spare parts for BMW - New parts
That shop looks like has everything! I think that shop is not the cheapest...Why u do not use ebay or google to find something

i do but ebay is not the best choice because of shipping they charge alot .. i use to go to ECS Tuning but now snice the canadian dollar is so low i dont really order anything there anymore.. i try to look around here now but not many canadian sites that sell bmw parts :(

U have x5 :) it takes much money :) and of course it is European car and all best part shops will be in Europe... that shop I gave u is good I thonk... bit it is just one of many!

yeah maybe im just gonna order a direct fit from flowmaster ... but do you know where i can order a H-Pipe i did wanna cut out the Resonator and replace with H-Pipe

U mean this part?

i have no clue how it looks i only heard them on you tube and they sound very nice i like it way better then the sound of X Pipe