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I just had my SOLO Mach Balanced and high flow cats installed on my GT. I had this setup on my first G* GT and absolutely loved the sound. This time it seems like it's a lot louder and crackles more, especially above 2,500 RPM. I have the exact same setup including the RotoFab and 3.5" tips. Is there any way to make the system a little quieter without taking off the HFC's?

It's not bad while driving normal, but it's VERY loud when i get into it.
 

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When mine was installed we added solo's resonators at the rear after to listening to the car. Its tight but there is enough room and it tones it down quite a bit. Still got a good bite when your into it but reasonable now around the suburbs.
 

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Did you guys every throw any engine codes when putting on the HFCs? Im thinking of getting them. i currently have the Mach 1 balanced.
 

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I love my Solo set-up and wish it was a little louder. I ran the HF cats for 2+ year before I started throwing codes last year. I think my problem was it all got a little loose as it's rattling against the cross-member now. I tuned it this year and have not had a code yet. Will do some suspension work in a couple weeks and take the cat-back off and then re-install. I'd put them on again in a heartbeat. Good luck!
 
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