It's a bunch of crap...I saw another post on this somewhere. If it was that easy (and cheap) to get that much horsepower, one of these guys would have figured it out a long time ago.
I would save your $10.
1998 T-Red CSVT (1492 of 6535) Born on 5/30/97 KKM 4.6L TB with custom "Throttle Optimizer" Bassani Exhaust NP-Tuning Sniper Intake Pipe Fog Light Mod with 885's Clear Corners Stereo - Oh Yeah!
He's trying to lure people to leave positive feedback for him so he can scam others. The "timing advance kit" he's selling is probably some junk LED's on the dashboard or something.
UBRF.org , Western New York's Premiere Automotive Forum.