stage 3 lotus exhaust

I recently won a “stage 3” lotus exhaust on ebay, is there any way to tell by looking at it that its a stage 3 and not the standard oval pipe? Someone mentioned that it should say janspeed on it somewhere? is that correct?

If its standard it will be massive and weigh a ton, stage three is smaller and has a round stuffing box iirc

This was one of the first search results for stage three and seems to be current on seloc classified, however it is a standard back box and NOT a stage three…

Ok found one, this is a stage three

cheers for the info and pics, I have pm’ed you

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‘Track use only’ should be indicated