Picked up the truck Friday night from Modern Performance following a full re-build ie. pistons, rods, valves, roller rockers, port and polish the heads,port and polish the intake, 10 lb supercharger pulley,demon coils, custom cam ( originally built for Eddie),billett mains,Ram dual clutch w/aluminum flywheel. We did not however change the exhausts (Bassani headers, three inch catless mids and magnaflow exhaust). Can't believe how loud this thing is now. Even at idle the truck is just plain loud and now suprisingly lumpy and mean. Really have'nt wound the thing up yet, I'm trying to restrain myself for the first 1,000 miles. But my question is, does porting and polishing increase and change the sound of the exhaust??