brought my car to the shop for saftey inspection adn they fail me becuase of low back pressure in exsuast. what cuases this and what should i do to fix this problem. i know i have 2 leaks in the the exsuast by the cataylic converter. can this be the cuase?

 

Yes, and is probably your cause. Low back pressure means low pressure basically, things that will lower this is: Leaks, high-flow cat, larger exhaust and different type mufflers.

 

Check your other thread. I just posted in there lol. One thread per topic dudeeeeeee