Here in the UK, early 3rd Generation cars don't have to pass emission tests. So with all the knowledge that you people out there have, can you tell me what can be removed, to make a car that will be used on the road, go better?
If anyone is going to say use the search, I've tried, so whats the keyword to use?

 

I think you want to search for simplified sequential turbo setup. There is a vacuum hose diagram that shows it too.

 

full exhaust should remove 2 cats if the car was from the US, 1 if it's from japan. jap cars also wouldn't have the EGR i believe.

you won't make much from removing things other than cats, but it's all in the name of simplification under the hood. just make sure you don't boost higher than stock without some form of ECU.

 

Type in Non sequential, rats nest, solenoids, terms such as these will yeild info you need.

Tom