Hey guys I bought a used parts lot can you help identify this esc? It has 4mm plugs and sounds like a castle product with the tones it emits but I'm not sure? What model is this?

Sv3 sidewinder wp

if you have a castle link hook it up then you will know for sure..

I have the castle link just gotta find it thanks!! anyone know of a good place to buy 4.0mm extensions or 3.5 to 4mm that's not in china?

Judging by the cuts on the case, it looks to be an HPI Vapor Pro. The sidewinder never featured a fan molded into the case.

The Vapor Pro is a version of the Castle Sidewinder that came with a fan and had slightly different software than the normal sidewinder.

From the picture, this appears to be an older non-waterproof model.