The story so far, had a Cobra Resonated two part system purchased from the great team at Tarmac Sportz fitted to my roadster by a local tyre, exhaust service centre so all paperwork in order, now one week down the line ins co still not entirely happy to amend my policy as they have investigated the " Cobra set up " I have on the Cobra website and have discovered an independent review suggesting a power increase of 8bhp approx with sport cats and y pipe along with corresponding torque increase, I did suggest this is not what I had fitted to my car....... and as we all know the bhp on a fourteen year old car sure ain't gonna be the same as the day it left the factory !!!! so even one bhp extra is not gonna be anywhere near factory spec,
So watch this space, the only good thing to come out of this is the fact my contact at the ins co sounds like a bit of a petrol head so am still fairly optimistic.
PS have added M Performance back box to my Beemer no problems and also a cat back system on a Golf Gti back in the day, yet again no problems.
Would be interested to hear any comments.