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Discussion Starter · #1 ·
Hi
I have '07 civic Si with some mods (purchased that way). it had full skunk exhaust when i purchased the vehicle, but it was WAY too loud, so I have replaced cat-back with the original part in october. Recently I have noticed that the engine goes into vibrations between 2400-2600RPMs, the rest of the power band no problems, jus that 300 span. I was wondering if that change could have caused that problem.
Only time that I can feel the vibrations is when the car is standing and i rev it up to ~2500 rpms.
:confused: Any advice on what could cause the issue would be highly appriciated.

Thanks for help...
:pinkvtec:
 
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