I agree with the above comments, stay N/A or go SC if you plan on getting dishing out big dosh for the Amuse R1. TT will breathe and benefit better with larger piping diameter (Amuse= 2.5", turbo back exhaust= 3").
And as for is it worth 3k? I paid 3.8k for my Akrapovic Evolution and you definitely get what you pay for (build quality and finish is astounding, orgasmic note, perfect fitment and proven gains). It will be no different for the Amuse, if you do plan on getting the R1 will you also be getting the Y-pipe? Please also bear in mind it will be hidden underneath your car so not many will be able to appreciate such fine craftmanship.
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