To me there are things that can be done to help cooling. High flow larger aluminium radiator, RS500 size or larger intercooler, pre-turbo cooler, new fans wiring loom and fans thermostatic controller. My cone filter is inside an aluminium group A airbox which shields it from excess heat and has a bottom cool air opening.I have the bonnet vents as well and so far have never had any overheating issues. The standard set up is not good enough once you start going for more power, remember it was designed to cope with about 204BHP not 4, 5 or 600+ bhp !!