Hi, I recently fitted a de-resonated cat back ninja 2 system to my completely standard 05 impreza sti. Want to get it ready for the next stage before goes in for remap.
I want to replace the downpipe with a ninja sports cat and decat the straight section.Will I have problems passing the m.o.t. thow?

 

More of a chance if you map for the downpipe but a 100 cel sports cat will be pushing things close, get it red hot before the test!

 

Japspeed seems a good option....and heard good things

https://www.scoobynet.com/group-buys...-in-stock.html

 

Was looking for a prodrive downpipe but there beyond rare aint they.will have a look at the japspeed one.swaying to tge ninja at the mo.warmer the better on test day and fingers crossed :-)