i have an 03 4.6is diff than a 4.4 i know but i'll chime in !!

i had a cold air intake , engine and tranny software done from habberstadt in huntington long island (great guys btw speaak to joe ) and i gotta say its nite and day !!

the throttle response is much more crisp and the power comes on much stronger..

my 03 4.6 takes my neighbors 06 4.8 from the line all the way up to 100 by about 2 car lenths !!

well recommennded in my book !!

pm me if your local and we can meet up i'll let you drive my truck !!

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2013 F10 M5
ALPINE WHITE/BLK/ANTHRACITE