347stroker

  1. paddyrk

    Digital Tuning 1991-exhaust crackles

    Hello all, I have a 1991 347 stroker lx 5.0 with the HP EFI system. I have an off-road X-pipe with shorty headers, full tail pipes, and mufflers. I would like to know how to do exhaust pops and crackles, such as when I let off the throttle after acceleration. I have not had any success with...