The exhaust setup on the tiguan has 4 restriction points.
The first being the downpipe from the turbo (this will allow you to utilise stage 2 ecu upgrades)
The second being the catalytic converter.
The third being the resonator.
The fourth being the rear muffler.
The resonator basically difuses the variable airflow and allows the exhaust system to flow smoothly (from what i have read)
This will net you a slight performance boost if it is removed however hte sound will still be muffled from the rear muffler.
The rear muffler is the way you want to go if you want more sound (check out my thread)
Video here: http://videobam.com/xYgSl
Exhaust setups are always going to be a personal preference so i would suggest going to youtube to find some soundclips of systems with sections deleted to get an idea of what yours would sound like.
Information that might be of use to you is the Mk6 GTI uses the same engine coded as EA888 so you could search for those terms and see if they have done anything since the tiguan isn't as popular.
Also search for muffler delete or resonator delete.
Bear in mind most people tend to delete the resonator and the muffler at the same time with a straight through pipe from what i have seen.
The chip will give you the best performance for $$ gain over anything.
I went with APR and have had no issues at all.
Feels like a totally different car to drive, almost like a sports version of the same car.
18" or 19" wheels tend to look the best without causing an overly harsh ride.
I have no issues with my 19 x 8 ET35 Wheels.
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