As others have said, with the $$ investment you are making you need to do some research on the shortcomings of the stillen kit. Topgunz A2A and an Ecutek tune solves the problems and will get you a lot more power.
Also - your bolt-on HFC's may not last very long in conjunction with the SC... too much heat. Most people have to add the cats further downstream. Otherwise - going to be an exciting build!
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