Im stuck. I dont know what to do. Im torn between the GTM res test pipes or Berk HFC's. I want more sound out of my exhaust, but i cant deal with drone. I dont mind it loud when i want it loud. But, i cant deal with drone while cruising haha. As anybody here had either set up, or switched set ups for one or the other for lack or, or too much sound? Also, has anybody noticed an difference in power from switching from HFC to Test pipes, or loss of power from switching from Tp back to HFC's? My current exhaust set up consist of magnaflow mufflers, and magnaflow resonators with otherwise stock pipe between the magnaflow components. The exhaust sounds nice now, but i want more sound, and more power would be nice haha. I searched but couldnt find any real direct comparisons.
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I have the Berks HFC's and my exhaust sounds NICE!!! Stock cat back tho.. Sound is VERY coupish.. LOL

 

I've got the Berks HFC's I had them with the stock exhaust and it made the exhaust tone a bit deeper, then I changed my cat back to Gemini and it sounds awesome now, I don't have any drone noise, nor is it too loud. I did feel a slight power increase (Butt dyno).

I can't comment on the RTPs but they do look nice and I am even considering changing over myself because I'm not too worried about drone, and I highly doubt that I'll get drone with my cat-back setup (new X and Y pipes have killed any drone I had) so maybe in the future I'll go the RTP route.