2,100 streetable horsepower with a 'super mello' camshaft? That's what Nelson Racing Engines has built for a '68 GTO in this 540cu twin-turbo Rat motor. Check out the details and watch it run on the dyno!

Texan Mike Keisling wants to go 250 mph in the standing mile, so he asked Tom Nelson to help build the baddest COPO Camaro and stuff a 632ci BBC under the hood. We take a peek at the twin-turbo beast.