Quote:
Originally Posted by Jason
AC Schnitzer has now tuned the M6 Gran Coupe to an impressive 665 HP / 652 LB-FT, up from the factory quoted 560 HP / 500 LB-FT.
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Several credible independent dyno tests have run bone stock S63TU engines and found more than 600 horsepower.
Where is the documentation on Schnitzer's premodification testing of the stock engine?
These numbers mean nothing and for that matter all modification claims of improved performance are meaningless without baseline/premodification testing numbers.