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Originally Posted by PaulGT2164
well its not just a chip mod....miltek downpipes, cats, and exhaust, intake, 104+ octane gas, spec stage 2 clutch...and well tuned..i know what it ran, i was the one driving it considering its 260-270 hp stock at the flywheel, and with the chip, downpipes, intake, and all new o2 sensors, i can see 80-100 more hp outta that quiet easily...i dont really car if you belive me or not, me and about 200 other people all seen it, and considering some of the cars it has easy made quick work of its all good, i even have some video of the races i may post later
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Take it easy! All I was saying is that with only a chip modification it's impossible for a stock Audi S4 to reach 400 Hp...
If you say the car you drove has a lot other mods besides the chip (bigger downpipes and cats, exhaust, intake, etc. plus the fact you were using 104 octane racing gasoline) that's more reasonable, altough it's still hard to believe it would put out 400Hp at the wheels (O2 sensors DO NOT increase horsepower, trust me).
Anyway, it would be nice if you posted the video, that would dissipate all the remaining doubt, and if you say you ran low to mid 12's on a certified NHRA dragstrip in an S4 equipped with just minor mods (chip, downpipes, exhaust), I believe you, just don't tell the guys at AWE Tuning, APR, ABD, MTM, Sportech, etc.

all of them must be wrong.
I strongly recommend you this month's issue of European Car magazine, where they tested a host of modified S4's ranging from 340 to 425+ Hp and look at their 1/4 mile times

maybe that would shed some light.
Take care and wish you improve your writing