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Hello and welcome to Scoobynet.SJ.

 

Welcome to Scoobynet. Living in Plymouth makes it easy regarding any mapping or garage work.

https://www.enginetuner.co.uk/

 

It should come with a certificate with the VIN of the car on if it has the full Prodrive Performance Pack, which included a ECU flash, exhaust and Y pipe for the turbo if I remember. Bits were optional extras at the time some cars come with just the back box as an example, which will either be stamped Prodrive or WRsport.

There wasnt one on my hawk but the olders cars did have a sticker on the ECU as well. Looks to me, and someone will correct me if I am wrong yours has optional seats and wheels but could also have the PPP

 

This might help

https://impreza.co/ppp-subaru-prodri...formance-pack/

 

They should be able to via the VIN I would have thought as ppp requires the cert which has the VIN stamped on it so there's a record somewhere

 

This is what you would get from the dealership.

https://images.app.goo.gl/gf7H46RUZWV38ygSA