Ok heres some up front info
2004 wrx sedan was bone stock. (or so I thought). On the stock exhaust there were leaks in the back of the exhaust and in the stock downpipe in between where all the parts were supposed to have gaskets. My stock exhaust sounded like an aftermarket one and I knew it was time to replace things.
I went out and bought a turbo back exhaust complete with up pipe. Tore the car apart per all the great instructions on here to find that the up pipe mod was done already (should have just looked at the egt cable that had a resistor in it already-but didnt).
Long story short, the person who did the up pipe put heat wrap on it and the pipe looks new so it was left alone (something I think I regret now and might be the issue).
Put on the new downpipe and rest of the exhaust and put the car back together to find my small exhaust leak up front now is loud as hell.
When I step on the gas, instead of hearing the exhaust out the back im hearing it out the front (only when the gas pedal is pressed down) but when the car is cruising its coming out the back just fine.
Do you guys think its just the up pipe that was done before or it could possibly be the stock headers etc.. I really dont want to do headers on the car since Ive heard aftermarket ones crack and are a pain in the ass to get installed. Any help would be appreciated thank you very much