Ford Focus ST Ford Performance Catback with catless downpipe HD

1320 catless downpipe paired with Ford Performance downpipe. This setup has minimal drone when cruising. With music playing I cant hear any drone from inside the cabin. Other mods on the car are; FSWerks Intake CPE Stage to DSMM Levels intercooler Step Colder NGK plugs Fifteen52 Formula GT 18x8.5 BC Coilovers RS Brembo Kit Mountune Track Pads JBR Shift arm(Set to 40%), Boomba in car Shift arm set to 30% Boomba Shifter base bushings Solid shifter cable end bushings. Stratified custom E30 tune with custom pops and crackles. While driving the exhaust crackles more than it pops. Somewhat similar to the RS "Burble Tune"