i believe i happen to have an exhaust leak on my honda civic 95,Lx 1.5L, what parts do i need to buy for this problem?im a noob

 

where is the leak coming from?

 

i have no idea, my smog test failed i have high nox on 15mph, so im guessing its a leak.

 

NOXs are not due to exhaust leaks. I believe it's from running too lean and having higher than normal temperatures in your engine. Are you running advanced timing, higher compression pistons, have any vacuum leaks, etc?

 

im not sure if i have any of these problems, i might do , but what can i do to get it checked?