2007 Subaru Forester XT built motor ATP GT35R cosworth cams idling

Just a short video of my monster FXT and its lumpy idle. It doesn’t always do this, its just for a short while when its warming up. Its got Cosworth 278/274 cams in it, and they like to be heard while its warming up I guess Its a full built monster of a motor with a rotated 35r and methanol injection. JDM STI Spec C RA non dccd 6 speed, brembos, all of it. Its a blast to drive and is scary fast.