Originally Posted by Sachmo12345
i cant believe it can make it from 170-225
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That's just the beginning - upgrade the turbos and do the exhaust and downpipes you are looking at a lot more.
Adding hp is easy for Audis - here's how the increases are for an S4
Stock --> 250 hp/258 lb-ft (US model)
Stage 1 = Chip --> 310 hp/360 lb-ft --> cost $700
Stage 2 = Chip +exhaust --> 320 hp/370 lb-ft --> incremental $800
Stage 3 = Chip + exhaust + downpipes --> ~350 hp ---> incremental $800
Stage 4 = turbos from RS4 + fueling kit + stage 3 --> 400 hp+ --> incremental $6000
Note: teh above numbers are what I think going from memory --- may be a little different from actual but should be in the same ballpark...