Thanks GLLHG, on my cvh the filter is apparently from a Rover so would have to be replaced with freeflow variant.
I will confirm this from garage.
I am also considering heat shielding for intake air system - duct from inlet/filter box etc.
Hopefully this will reduce the effect of exhaust heat effects as the air intake is above the manifold with only a thin metal heatshield. I don't want to go the route of exhaust wrap or coated exhaust. I want to get heat shielding for the rear front wing area anyway as it can warm up due to exhaust being very close to it. A job lot to both areas is likely route
I have seen DaveW articles re heat shielding so will use them as a guide.
