i have a 1999 2.5 and i made some mods to the intake, and although i didnt dyno test it, i have no doubt that it made an improvement.
I got an evoms cold air intake, had a bigger aluminium intake pipe fitted, got an ipd plenum and finally i bored out the throttle body and had a bigger butterfly valve fitted to it.
all this together with a remap DEFINATELY made a difference in throttle response, not to say that the car sounds like a different beast now.
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