Hi Unknown

I'm not sure where you are getting your information from, but there is very little in common between a SimJet and a Ram, or a Jet Cat, or an AMT. The only possible common parts are the bearings and possibly the turbine or compressor wheels. All the other components on a SimJet are produced specifically for SimJet.

Although the above mentioned engines share a common ancestry, they have all branched out in their own direction. They have modified the original KJ design in their own way to create the engines they have today.

Sincerely,
Ed