Lots of threads on lowering underhood temps. With the heat, been reading quite a few of them lately. Thought I would compile them into an FAQ First is TreerootCo's louvers. This looks like it is fresh from the factory Many people found vents and cut the hood to fit CorvetteFan did a great writeup on using Pontiac GTP Louvers. This was based on Summitcruisers install documented in this thread Citadel installed Chevy Lumina Z34 vents in this write-up voorland80 installed a set of 4 vents in this write-up eibach1 installed side vents form a landrover in this thread murf installed 100 series side vents in this thread. These did not require any mdification to the hood supports This is an FAQ thread, so discussion on the individual installs should be in those threads Post up if you have another install, feel free to link to yours or anothers threads.