No...those are still there, but once again, they are tiny changes and I'd be willing to bet that there would be no performance differences betwee a gutted stocker compared to the most super-fantabulous uppipes. To each his own man.

Everything I've read is that the uppipe cat is for cold start emissions. I'm counting on that fact, I never want to mess with the uppipe again, and then every 2 years after that.

 

Hey dude, I'm not bashing your UP, I'm just being critical. As far as bang for the buck and stock-look goes, a gutted stocker takes the cake as far as I'm concerned. Did you notice a pretty big difference in spool up time with the gutted pipe?

 

You hurt my uppipes feelings

Hhahaha no worries! I noticed a bit of a drop in spool up time, I think about 2800rpm I get full boost instead of like ~3200-3300..

But I did the DP at the same time so I can't say which gains are from where

 

Hey Miguel go to nasioc, someone is selling there uppipe for $100 under the Bay area forum.
later Dew-subaru

 

Oh yeah, you can find uppipes on these boards for cheap. I still say that if you're willing to spend the money, you won't be disappointed by the APS unit. If you don't like that, and you still want to spend a bit of paper, go with the Perrin or PDE. If you want a good uppipe for cheap, go with the MPJ or Gruppe-S. They both have wonderful customer service. If you want something that will definitely pass smog, gut your stocker. Now can we please end this crappy thread.