so I had my Injen exhaust installed yesterday (very similar to the FI in layout) with HFC's and there is noticeable drone between around 1800-2900 RPMs. I downloaded a realtime sound analyzer app, and my resonant peaks at around 131-136 Hz, which is about a 25" pipe. I took it to a "performance exhaust" muffler shop that advertises that they do "custom" exhausts and even showed him a picture (from this thread) and a drawing that I made. He told me he couldn't do it, one because there wasn't enough space (Looked like plenty to me) and two, because the exhaust is SS. He said he couldn't weld SS...????
Anyway, the drone has already gotten a little better just from driving and putting a little mileage on the HFC's and mufflers, so I'm hoping it will get a good bit better on its own, but if I do need to take this route in the future, does anyone else know of muffler shops that can't weld SS??? Is this an anomaly, or is that pretty common?
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