JW12 5 Port .12 Complete Coupling (rebuild kit)

This is a complete coupling for the JW12 5 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 3 Port engine.