i have a borla header and a apexi exaust and my cat went bad today i dont know if i can put a high flow cat on or an i going to pay for an oe one i just want to know if there will be enough back pressure with all that high flow piping on there

 

Dude, you're fine. I wouldn't put another cat on it, just a piece of pipe that correspondes to the exhaust size. But I live in Colorado, where emissions is a cakewalk. When are you due for emissions?