Got my first MOT next week on the P1, at the moment have Haywood/Scott downpipe and Scorpion centre and back box. All decatted.

I think the sound of it is too loud and now find it a little irritating - I am thinking of going back to the original STI that came with the P1 as std (would I lose a noticeable amount of power - not sure!).

Any advice on whether this is a bad idea or combinations of the exhaust to reduce noise (mainly annoying on motorways).

 

If its not a "friendly" MOT station doing this, you'll have to stick a cat back on to pass

 

yep I know that...I would looking to see what combinations would reduce the exhaust noise...

 

You may find that the car doesn't go aswell with the STi backbox on as this has baffles, where as the H&S system is straight through.

Speak to Ian on 01268 727256 as he will be able to make the backbox quieter - though there are cost implications