thinking of going down the de cat route on my 53plate wrx would it need a remap or would i be best keeping a cat on either way not a problem mot wise ive a scooby friendly mot station s what would you recomened guys

 

If you de-cat then would be best to remap and at the same time put your power up to about 270. As if would mess with the lamba sensors

 

idealy a remap would be the best route, but i know of at least 20 people that have fitted full decats with no remaps with no ill effects (me being one of them on three different scoobs)