Hey there. I'm tracking my SHO PP 2010 in the mid atlantic area on various HOD tracks. Had engine stumble at 120 mph on the Oak Tree straight of VIR last friday. It would kick out of gear and cut the engine to idle, 3000 RPM and didn't throw any codes. Happened on only ONE part of the track, no where else. Weird. Scratching my head on it. Thought maybe tranny was over heating, PTU over heating or something like that. Can't be the speed cap because of the tune set that to 300kph. I did find out later my cold air intake filter was dirty, so, hope that was it: running too rich. Hence, not enough air at MAX sustained engine demand at speed loads. Regardless, a tranny cooler may be in order. So, here's the big Q: What mods should a 2010 SHO PP get to do sustained high speed runs reliably on loop tracks with 30 minute hard driving track sessions? Current mods list : Livernoise 440T tune, muffler delete, 275 40 20 Michelin Sport 4S's with 20mm spacers, God Speed Coil overs, adjustable dampening, with lowered suspension, 2013+ HD brakes (calipers and rotors), Hawk HPS 5.0 brake pads, cold air intake, rear differential drain plug, PTU drain plug, PTU vent / fill mod, FL500s oil filter, noise maker delete, update rear toe links, all new "bones" on front and rear suspension, new stub bearings. Next steps: track pads, tranny cooler and cooled PTU (when and if the PTU ever blows).