Originally posted by JonnySVT:
Ah man, you've been on here how much longer than me? There are mentions of this DAILY and it is common knowledge. That is rasp. If you want to "fix it", put the resonator back on. Or put a glasspack or hi flow res in it's place.




I don't have a Res and I don't have rasp either all I have is a muffler where the res goes... and yeah it's a Zetec but my exaust was on a duratec with the same results.

2003 Subaru WRX some mods Even if you don't have the answer, you certainly have to admire the problem. aka ZetecRacing