Add the HFC's and drive around with them and see if you like em. Take a video.
If you decide you don't like, then consider adding another set of resonators ($100)
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2009 Brilliant Silver BASE 7AT | TEIN S-Tech Springs | K&N Drop Ins & z1 Maf Tubes | AAM S-Line Short Tails | 5% Tint | 20MM Spacers | Sport Spoiler NickTurnon's 370z Build
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