If I ever get the engine rebuilt to a stage 2, I'd consider bigger turbos.....I'm also worried about lag. I like the instantaneous power/torque my smaller turbos with the lightened drive train (flywheel, driveshaft, underdrive crank pulley) develops. Hoping the Dupree super-splits adds to it all, and wish I could get the Iconel exhaust manifolds. (Maybe on my next dream engine).