Heavy Duty Trucks - Conventional Trucks w/ Sleeper, Volvo D12, 2006 VOLVO 630 DOUBLE BUNK SLEEPER, RARE TO HAVE A DOUBLE BUNK IN A MID ROOF SLEEPER, VOLVO D12 POWER, 13 SPEED MANUAL TRANSMISSION, 90% VIRGIN RUBBER DRIVES, THIS IS A NICE PRE DPF FILTER UNIT AND IT IS READY TO WORK.