Hi,
My 2006 2.5 STi has been mapped for a Magnex full decatted exhaust. If I temporarily fit the stock silencer (muffler) for a peaceful long trip, what will the stock silencer back pressure do to the mapping? Will the run car run ok or will it have problems? Could I do any damage? What will the ecu do when I put the Magnex silencer back on after 500 miles?
Thanks Peter

 

stock silencer isnt going to too much different to the one you have on (i'm sure someone told me that the stock STI exhuast is a scorpion one anyway).

i wouldn't give it te beans everywhere tho

there will be not effect by replacing after, just the damage caused whilst driving

 

i think it would cause some back pressure on your turbo but i dont think it would be enough for anything to go wrong