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Question…it may have been answered; I did a quick search and could not find it. I’m thinking about doing a full bolt on build at the moment stock turbos (I may upgrade turbos and do a hpfp and injectors eventually). That being said, what are the stock turbos good for HP wise? Assuming I do...

I’ve usually run cattless downpipes in a majority of my past performance vehicles. That being said, are there any performance numbers for high flow cats vs catted down pipes on these vehicles? Is there a huge HP difference between the two, all other things being equal?