its weird, like when i shift, from 2nd to 3rd, i hear a gurgle and pop from my muffler system, i have a tanabe hyper medalion system full 2 1/4" in to the cat, i mean its cool, cuz it seems like my s14 is backfiring like one of those highly tuned JDM S14's, but then again i still got a KA, it gets kinda annoying if your trying to leave ninja style from anywhere, cuz they'll know its you leaving...lol. well, my friends suggest that i need a hi flow cat, but i dont know..any opinons?

 

Moved to NA, post in the right area please

Sounds like your running a little rich.

 

ever since i gutted my cat it backfires, it sounds weird though because i have hundreds of exhaust leaks