hello! everbody this is my first post because i live in a town with nobody that knows anything about subaru especially not a wrx.
so thank you so much for any help in advance.
So about a month ago this car was snappy fast and sounds like a monster. the previous owner has done a few modifications. including aftermarket exhaust.
suddenly the car got laggy, doesn't pull very hard for about block off the start
the exhaust isn't low and deep its high pitched and cracking and backfires and sounds like a ghetto honda.
we replaced the air filter which happens to also be aftermarket. it has "aem" intake piping down to bottom right with a conical spectre filter. we went ahead and put a new one on.
it is a 2002 with 93000 miles.
Please let me know where to go next i am stumped