If anyone thinks you can actually use 400hp on the street, the don't live in the USA! There is NOWHERE on a street that you could realistically use 400hp.
It only takes ~ 80hp to go 80mph.
From a standing start I doubt you could hook more than 200-300hp on your average street asphalt (less if you live in the N. East).
Hell, even if your running to the grocery store on drag radials you probably couldn't use that much hp...
But we all want more don't we? For my part, I plan on taking more visits to race tracks, SCCA events, and closed course driving training events to make use of all this newfound hp, as thats the only real place to actually use it!
550hp LS9? Yes please!
~LSx