G'day What you have in the box is the latest Saito 90TS which was built to look like the engines in the original Piper Cubs and was designed particularly for mid size Cub scale models such as the Goldberg Anniversary Cub. The picture is of the earlier 90 and 100T engines.

The 90TS is a "boxer" even firing engine with a double throw crank and is a very smooth running engine. I have one in a Cub and it just purrs and does not drop cylinders.

The older 100T engine is still available and is slightly cheaper here in Australia. It is an uneven firing twin with a single throw crank but it too runs well though differently

The smaller 60T is the same style engine ast he 90TS.

The 60T will power a small Cub well and the 90TS was intended for Cubs on floats but I find it perfect in my land lubber Cub.

I flew it initially on the front of a Kadet Senior to make sure it was run in and reliable and it flew the Kadet really well too.

Enjoy. They are really nice engines.