Article: SIX-PACK ABS; BMW did a reliably great job on M6, but AC Schnitzer went nuts on it.(Special Report)

Byline: MATT DAVIS

AC Schnitzer seriously blew its concept-car bankroll at Frankfurt with the M6-based Tension. The paint job alone is so killer, we couldn't help but want this show mobile on a Woodward Dream Cruise.

Given the 5.0-liter V10 in the M6 is based on the current Formula One engine, improving the power here is a subtle endeavor. Rather than dump a chip in there and wind it up to 1000 hp, it is the header and complete exhaust system that change to unleash a perfectly happy 544 hp, or 44 extra steeds, with minimal remapping.

Torque meanwhile gets a poke from 376 lb-ft peaking at 6100 rpm to 390 at 6200. With no rev limiter, the beast is ...

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