That's beyond NICE. Great infor.. so I stand corrected, on the boost.I have 133,000 miles on my 2006 Mustang 4.0 V6. For 103,000 miles it has been running an X-Charger with around 330RWHP. I am running between 11-12lbs of boost. With a proper tune there is now need to upgrade the fuel system at this level as the fuel pump duty cycle is well within acceptable limits. The bottom end and pistons have also proven to be able to handle up to 400RWHP with Turbo applications without issue as long as properly tuned to totally avoid any detonation which will destroy the 4.0 in short order. At that level of power a Boost-A-Pump upgrade to the fuel system is all that is required as far as the engine is concerned.