I've never heard of an L series getting that high, and living to tell about it. You'ld have to have a NASTY cam, Forged pistons, completely perfect balance done on the lower end, Titanium valve train etc...Triple 45mm DCOE carbs, or some seriously adjustable F.I. But, I think you might not want to try to go this route, it's not a Honda...you don't need high revs to make power. There's alot of modifications you can make for some serious ass, Turbo, Supercharger, Cam, Exhaust, Ignition. Build the right Turbo set up, hit it with about 20 Lbs of boost...and the Honda boys on the street will never touch you.