Hi Guys,

As the title suggests I have a quick question in regards to the Exhaust / Cat / Dump Pipe of MK4 GTI's 1.8L Turbo.

- Is the standard dump pipe off the turbo (where the four bolts are) Mild Steel / Stainless Steel or Cast?

- When people upgrade the exhaust system, do you also change the factory Cat? (I have been told that these Cats are Euro 4 and can not be replaced by just a standard performance high flow cat.) or do you not use a Cat altogether? (Is there legal issues with that???)

Any help would be great!

Glenn