stage 3 S4 vs new M5.....does the s4 stand a chance ? from hwy pulls...
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#9
If it's a matter of finding a dyno that will produce the number, regardless of being accurate,
I can see the 400whp being substantiated by a dyno pull. I had multiple 400+ whp pulls on a dynapack, I don't believe they were accurate since a FATS-whp calculation produced a number very close to what I got on AWE's dyno.