New gasket but still leaking ?
 

Hi all , replaced my leaking rocket cover gasket and all seems ok and at the same time I needed to replace the up pipe gasket as it was blowing so replaced it this morning but it hasn't sealed it and it's still leaking ! It's a bug eye wrx 2.0 on a 2001 and genuine gasket was used ! I made sure the surfaces of the exhausts where clean but still the same ! Any ideas ? Thanks all .