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Old 22nd September 2011, 16:51   #1
IM6
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Has anyone on this forum deleted cats

Hi Guys,

Need an urgent advice from those who have removed their primary CATS from the headers. I have been contemplating doing this but have recieved mixed opinions from various motor tuners such as potential damage to the headers etc etc. then again Ive a local company who have performed such modification without problems on m5. They will drill out the CATS which will become a permanent deletion. I am slightly precarious about doing this, hence im asking for advice.

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Old 23rd September 2011, 16:14   #2
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Gosh 126 views but not one single reply..... ) come on guys help me out here and trust me I'm not a spy)
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Old 23rd September 2011, 17:15   #3
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It's because it's a double post and an issue that has been discussed in the past; always remember to search before you post and do it once.

Just gut the main cats and put the sensors after the secondary cats and you should be fine.
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Old 23rd September 2011, 17:17   #4
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aah thanks mate, will check on the pre-posts

gutting the cats will be the main issue
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Old 26th September 2011, 09:38   #5
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Salam Bro!

Did you check with Sal. What did he tell you.
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Old 26th September 2011, 15:43   #6
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How are you Hassan Brother. Thanks. Sal will obviously say NO because it sin his interest to sell the headers without CATS and all it is the stock header without CATS. So i cant justify the cost. Spoken to couple of guys who have used a certain garage who drilled the cats out on M5. But i just dont want to run into future problems such as dealer/warranty issues etc. Also loss of torque is my concern as well. What will you advise? drill or cut them out?
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