think there is a sound clip of it on the renault sport web site when Tim had it...
i have spent an hour polishing it up... and its getting there...still a bit left to do, but looks spot on
and yes it is a decat - its all unfamiliar with me, as im used to one manifold, one pipe, and one decat going to the centre box... where as this two manifolds, and two pipes... tim explained that the two pipes have been adapted, cutting out the original cat "box" with a straight through decat system