You can loosen ur bolts up and try to adjust at the hangers then try to tighten back. Even though you made ur x pipe level, adjustments affect everything from the cat back, so u just have to play with it.
FI makes a quality product so I'm sure there is an adjustment u can make to get it right. Good luck.
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STILLEN G3 || F. I. CF Non-Resonated CBE
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