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 The largest kit I've seen so far actually used on a street driven 4.6 is a 150 shot.... (The NX kit I think)
 Most kits for street stangs are dry kits offering around 75-100 hp.
 
 400 hp is one heck of a shot, and I would recommend a racing prepped bottom end before even attempting it.
 
 Just out of curiosity, are you actually looking into a full-out drag car, or just a street-strip cruiser?
 
 Just curious, because once you get to around the 500 flywheel hp mark, you start to seriously delve into money\tuning holes if you intend to drive a hp monster every day to work.
 
				__________________Uncle Sam 
"What the hell is up with all the gauges? 
Calling Captain Kirk, your ride awaits... Phasers on stun...."
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