No Direct Competition. The MST product line does not have any direct competition. The thirty-year-old flush muff is the only remotely comparable product and it compares poorly. Flush ports that are offered by some manufacturers are ineffective and difficult to use, and service only the largest and most expensive high end products. The primary problem with these systems is that they are "active" in the coolant system loop. This limits their ability to control distribution of fluids and precludes any kind of effective flushing or chemical introduction. The Guardian product line was designed from the outset to be a "passive" system, which stays out of the coolant flow loop until accessed.

Multi-Point Injection Hydrostatic Shock Pulse Mechanism. The multi-point injection design and hydrostatic shock pulse mechanism effectively sequences fluid and removes built up salt and deposits better than any known system. Additionally, the BT and DX systems provide the only method of flushing inboard and Stern drive systems in the water, without the engine running.

Other unique features of the Guardian systems include: