Re: cooler engine bay??
intercooler on an NA car, dont get ppl started with this one.
As for underbonet temps, 99% of cars with extractors have no problems. You can rig up a heat shield, get the pipes HPC coated, use thermal wrap or use XR bonet vents, all of which will definatly help.
Ive been described as a vault of usless random knowledge.
Ill take it as a complement i think.............