If you poke around the Site there's actually a video of that same viper going down the strip with nitrous and doing a 9.6 sec @ 150mph

So i think that honda has a little more than 400bhp

Oh and the 2 civics you are comparing are different.

There is Cheesefrogs, and then there is Courney Greens,

Courtney Greens is the 802RWHP, unsure what Cheesefrogs is as he says his old setup was 430ish RWHP