Installed a new ignition coil… started misfiring on cyl#5 , under heavy or wide open throttle, on Friday. P0305 code. Checked plugs, looked good, Swapped the coil to # 6 and test drove, moved to a P0306, then same when moved to #4 ( P0304).
$98 from the Stealer… seems to have fixed it with a quick test drive.
85k with stage 2 Cobb, w FMIC, intake, phasers at 50K ish…