I have 44,000 on mine with 22,000 of it above 400 rwhp. Hundreds of 4,500 rpm launches, maybe 200 drag strip passes. Did a leak down test a month ago and am losing 4% on all 8 cylinders. Did an oil analysis from Blackstone Labs and there were no issues, i.e. excess metals or chemicals in the oil itself. Doesn't use a drop of oil. My weak links include the Valve springs and clutch. On the Valve springs I broke 1 and wore another set of out. On the clutches I had a spec fail at 2,000 miles and they replaced it at warranty and I had a Textralia fail at 6,000 miles and they replaced it through warranty. When I replaced the last clutch I had the transmission rebuilt and found two broken keepers and heavy wear on the 1-2 synchronizers plus a bent keeper opposite the reverse gear shift path. I've burned a set of Nitto 245/45 17s to the ground and a set of BFG KDW-II NTs. I would have never dreamed the engine/drivetrain would hold up so well.