Can't identify this Viper Jet Engine

[madpatty]

Hello All,

I can't seem to exactly identify which series of Viper Jet Engine is this:-





















Thanks.

[madpatty]

Some more pics:










Thanks.

[madpatty]

I am thinking of starting to gather parts to at least try to make it run.

So I need help in identifying which series of Viper jet engine is this.

Thanks.

[Johansson]

Looks very similar to my 301/522 Viper.

[smithy1]

Agree with Anders, looks very 501 or 522-ish.

Smithy.

[madpatty]

Thanks guys