I also would like a cooler engine bay, I removed the seal between the firewall and hood and this seems to help, I also pop the hood and leave it open when i get back to my garage. Someone might have to verify this but I have heard that getting rid of the factory downpipes which have a cat in them and going to aftermarket downpipes with no cats really drops the temps. The cats act like a big heat sink whereas the divorced downpipes cool down very fast after driving