Several thousand of these have already been sold overseas. All Growler component kits include a roll bar, new wiring harness, new muffler and exhaust system, and new batteries. The other major components including engine, transmission, transfer case, axles, 'U' joints, wheels and tires, etc. come in two versions. In addition to the original or overhauled components, the company also offers a number of optional accessories such as a new top and frame, fully enclosed hardtop kit, spare tire swing away, 6' fording kit, etc. A person with slightly better than average mechanical skills can assemble either kit in approximately 35 to 50 hours or 3 to 4 weekends.
Every kit includes a Video with step by step assembly instructions.
The builder must title the vehicle as a kit car if used on the highway. One of the goals of the M151 development was to simplify driving and maintenance. It has a four-speed syncromesh manual transmission with two gearshifts. The larger is the normal gearshift with the smaller used only to engage the transfer case to the front axle for off road driving. The M151s were also designed for ease of assembly and maintenance.