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[crew18]

hi

i have one of the catalytic converters has broken down and makes a tremendous rattle at tickover and at about 3thousand 3 and a half it makes and ear ringing ear splitting noise.

i was wondering if it would do any damage to the engine if i was to remove them and put a straight pipe in place ??

[henryd]

It woudn't do any damage but it won't pass an mot without cats if you are in the uk

[crew18]

thanks i was gonna keep them and put them back on for the mot

thanks

[henryd]

if the cats are rattling as bad as you you say at 3k revs it still won't pas the test due to excessive noise

[amba]

If you are anywhere close to me I have an almost new(about 8k mile old) nearside V6 cat..its not oem  quality,but you can have it foc if you want it .