Originally Posted by
Chip
With regards to the screamer pipe, it wont make any difference to a static test as its closed of course, can effect driveby though, and in that circumstance the twin exhaust will make less of a difference than a static as its measured from further away so more like to hear both anyway.
Screamer will screw you on the drive by, but the exhausts pointing other directions do deffo help on drive by as they usually triggered as you go past, rather than at a distance, so you might be fine.
Ive even seen cars with the exhausts pointing at whatever side the microphones are not on on when its a car thats used at a single track.