Quote Originally Posted by 1439/2000
So is it that 1.8ts have really good flowing exhausts stock or is the turbo too small stock to benefit from a more free flowing exhaust?

I can understand a dp but the bottleneck effect doesnt change anything? Also the stock blow off valve is plastic I believe and the bosch ones that are in some porsches are metal. To me that would be a good upgrade as well. I'm still learning about the mechanics that make these how they are.
stock exhaust is poop. you could get a cheap 2.5" or 3" downpipe and hook an electronic dump up ... but I would suggest a 2.5" turbo back exhast. Should be more than enough to open the turbo up.

yes, upgrade the DV. Those things are weak and break when you start modding. Companies like Bailey's and Forge make aftermarket DVs ... or you could just snatch one from a TT.