Hi Guys,
This is a sweet deal and I REALLY want to buy this for my 570.
The FMF site says the only part that fits the 570 is #045481, as opposed to the #045386 & #045480 both of which fit the 390 and 450... I tried to email FMF to clarify, (about a week ago) but no answer to date... I'll post when/if I do.
Wishful thinking says it's all good, but I think the 570 is a slightly different beast from the 390 & 450. e.g. the OEM parts are different too; the 570 header is #81705007100 and 390 and 450 are #81205007100...
Would love to know the answer...