ok , so I installed my down pipe and LIC pipe today.....so vaccum is normal everything else seems normal car now makes real loud winning noise that it didn't before just wondering if this is normal....and when I say loud I mean it sounds like I have a huge supercharger in it

 

Yea, you're fine

 

is it boosting fine? perhaps a leak somewhere

 

I'm not an EVO driver but that sounds normal as long as the boost is straight like Bret said.^

 

yeah boost is normal, just wondering cause when i did the same mods on my wrx didn't sound as loud by any means.......thank you for the replies