Hmmm.... 1/2 a second + on a stock car for $400. Like how many things can you think of, maybe I missed some. Not to mention motor mounts, clutches, trannys, rears, half-shafts, brakes, and tires all live a lot longer with 20 lbs. less flywheel. Trust me, you'll be amazed at the performance you get for $400. But I won't beat you over the head it's your money.
Vernon