All the fine details
This is a complete coupling for the JW12 3 Port .12 nitro engine.
A complete coupling is a matched set that includes a fully assembled piston, sleeve, connecting rod, combustion chamber, head shim, and under-head o-ring.
If your engine needs to be rebuilt, this is the ticket!
This coupling is only for the 3 Port engine. It is not compatible with the 5 Port engine.
