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OEM exhaust knocking

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29
Had a look through previous threads I found but none seem to have a knocking coming from the front?

The story goes, had a 4-2-1 decat on, removed that for the OEM header and cat, now there's a really, really annoying knocking coming from what feels like that cat?

clearance from the ARB and subframe are fine and and there's no heat shields left on the bloody car trying to solve this :mad:

If anyone has experienced this before and or has the slightest inclination as to what could cause this then please let me know before I torch the thing haha
 
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