Another addition to the Quickboost line for the Kinetic S-2F Tracker is a replacement set of engines. The set comes with four parts – two engines and two holders. They are cast in familiar gray resin and are perfectly molded.

The installation is simple. Assemble the nacelle as per kit instructions. Sand down the backing ring so it slides into the opening, paint it up and glue the engine in place, and then the cowling, and you're done.

One thing noticeable in the comparison pictures is that the Quickboost engines are missing the rods connecting the valve covers and engines. They are easily made, and if you add ignition wires you have a superb upgrade.

In summary, this is a more detailed simple upgrade which is cast perfectly and fits very well and is very visible on the finished kit. A couple simple push rods and you're there. These are definitely recommended. My thanks to Quickboost and IPMS/USA for the chance to review them.