spoolingrx7

i just got a 2.25 exhaust on and i drove the car about a mile and i came up to a stop sign and when i went to go the car killed its self and then i got it started and when i went to take off their is no power and it sounds like a tractor i checked all my spark plug's and the back two are a little black but i get spark to all of them
and i checked the air mass sensor to but it's good and would an o2 sencer do this because mine is broke and it is over heating well thank for the help

k-rok

over heating, coolant seal?
idk if it would make the car do that though

hmm, sounds like a tractor and thiers no power, well maybe if the urbo exploded and now your running open header, but i doubt that