Ok here's my update. I had the opportunity to purchase a brand new HKS catback for under $1k so I bit..... I have installed it to my FI Resonated High flow cats, and oh does she growl. I love this exhaust guys. If I was given this before the FI, i would've never bought it any of the FI.... This has no drone. It is much quieter, but it is definitely worth it.
thanks again for all of the comments.
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