Originally Posted by SamE30e
My buddy and I just put a ESS VT550 kit on his E39 M5.
Nice kit, wish it had intercooling though.
I looked at the ESS kit but wanted something different. I am a big fan of the Vortech headunit and the RK kit will make it easy to upgrade in the future to a YS blower
Intercooling was a MUST here due to the heat in Dubai! I have a separate Oil cooler as well.