This is the best sound you’re gonna get on a 3.7 with high flow cats! Power increase is also noticeable right away!

Set up: Fast Intentions Resonated HFC’s and an Invidia Gemini Catback

There’s ZERO drone in the cabin at any speeds and virtually no rasp or hissing. Very close to stock sound inside cabin.

I see many videos and people with HFC’s on this 3.7 SEDAN platform and they all (almost) sound like crap in a tin can! - It’s in part due the lack of proper resonation that most aftermarket catback systems offer for the 3.7 sedan when paired with HFC’s. The invidia gemini does a great job at dealing with most HFC’s but there’s still usually some kind of hissing/rasp and that’s why i took it a step further to get the FI resonated hfc’s - the combination is perfect.

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