Sorry if this is double posting as i sort of mentioned this in an earlier post.
Quick one, is a cat back system on an type uk sti getting rid of the centre cat ?
Will it need a remap with a cat back system?
thanks guys

 

cat back is exacttly that cat back so cat's still in place

 

To confuse matters, there is the downpipe cat, then the second cat. I presume then you would only get the centre pipe and backbox?