Originally Posted by scoooby slayer

my silencer has 2 2" ports in the box as its 2 into 1 underneath car into a 5" backbox. i guess i could try and get through behind the back box into pipe again, but which pipe do i go in as it ts off into 2.

on the big pipe it was cruising at 14.7 stable then on part throttle as some boost came in got into 12s then 11.1 at wot but then showed going mega lean from 6k revs up, 17 afr lean which was no way accurate.
il put it this way when i removed the 1.5" pipe earlier it was pure black with soot from just a few pulls up the road lol its nice to be sure though thats its mega safe.