I checked out that website. 3-6 HP at the wheels? Yeah right. I think they overestimated that a little.
2004 D23 ATX ZX5: K&N FIPK, CFM TB, BSD, F2 Header, FSWerks Stealth Exhaust, Tom's Tune 91 Octane, SVT/Eibach full suspension, SVT brakes all around, 17" Black MSR Type 013, OEM style CF Hood