cost, for next to no gains unless you have an up rev. Total waste of money IMO. A mods that people say "you must have"
Balls, is my answer, don't be sucked in to it, you won't notice ANY difference apart from your brain kidding your mind into thinking there is some difference.
You will notice more difference fitting a high flow panel filter at a fraction of the cost.
Been there,
Seen it,
Done it,
Lost £200
My advice, spend the money on something else.
quote="Dicky"]
What's the downside of the plenum spacer mod . I was thinking of getting one