Have rang em and they said its not covered under the warranty.
They seem set on the fact there was no exhaust leak. But i havent touched it and it definately wasnt leaking before it got fixed.

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MY01 WRX
Turbo-back exhaust
Turbosmart vaccum lines
Turbosmart boost gauge
Turbo Timer

Its a work in progress ;)

IF IN DOUBT FLAT OUT!!