You don't need to personally own them to know they have had tons of problems. Your sample size is 1 my sample size is over 50. Do some research. I'm glad yours worked out after fixing the problems it had. Number 1 thing for me is cts customer service so I won't touch it.
On their site it said 3900 for turbo and 5k for turbo and tune. It may need updating just going by what the site said.
It will be for a R so traction won't be a problem that comes with a GTI. I personally will not buy CTS product because customer service means something to me and that's my personal opinion on the matter. I don't need some huge turbo. I have been there and done that on my 2013 Shelby. My goal is finding a turbo that has great customer service, reliable and makes 400-500 hp depending on what fuel route I want to go.I'm not going to sit here and defend CTS, but the fact is it is still a better kit than any option other than Iroz and APR (ill give the mamba clones Frank sells credit, they are better than CTS as well, just overpriced). Pagparts will more than likely be the best $ to performance ratio kit available when it comes out in 2020
This is coming from someone who has run is20,is38,hybrid and now a 600 and tuned the efr7163, 500, 600, dbv2, tomioka, etc.