these is the email pumaspeed sent me and who to contact.
"hi johnathan,
we are happy to look at the x37 here and assist in getting the turbo repaired. If you can send this to the address below for the attention of jason or myself, we will pass this across the development team. They will look at the internals to verify what has caused the turbo to fail, there may be some costs for parts to be recovered, however as tony has previously mentioned this will be done at a nil labour charge and also the parts at cost price at around £250.
Have you thought of upgrading to the x47r, which is our new turbo that whilst the team have the turbo’s out we could get this machined and the internals replaced to the x47r for an additional £75, so this being a total cost of £325? , this is just a thought for you.
Regards
stuart aldis
sales & operations
pumaspeed