The online editors of Motor Trend have decided to spill the beans, which allows us to finally confirm the information circulating the interwebs regarding AMG's latest flagship supercar, the SL65 Black Series.

AMG has cranked an extra 66 hp out of the twin-turbo six-liter V12, now boosted up to 670 hp, while stump-pullin' grunt remains the same at 738 pound-feet. Unfortunately, all that torque still needs to be converted through a conventional five-speed automatic. The power boost, however, is only part of the equation that unburdens each horse of 1.6 lbs, now pulling just 6.1 lbs-per-hp instead of the "lesser" SL65 AMG's 7.7 lbs-per-hp. That reduction is thanks in no small part (but many small parts) to an ambitious weight reduction program that does away with the folding hard-top in favor of a fixed carbon-fiber roof, itself shaving 88 of the total 570 lbs cut off the curb weight. That figure is now down to a slightly more manageable 4,080 lbs, which is still in SUV territory for a two-seat sportscar. Carbon fiber is also features on the flared front fenders, hood, rear underbody diffuser and racing buckets. That reduced weight is sprung on fully adjustable coils with an electro-hydraulic Active Body Control suspension and one-piece forged alloys wearing Dunlop Maxx GT tires in 265/35ZR-19 dimensions up front and 325/30ZR-20 out back.

A deployable rear spoiler, flat-bottomed steering wheel and Alcantara-clad interior also factor into the package, which Mercedes says would be capable of hitting 220 mph if it didn't electronically limit it to 186 (300 km/h), but 60 will come in the three-second range. The extra kit is complimented by a lower hood line enabled by the Black's exemption from pedestrian safety regs due to its small production numbers: Only 350 examples will be made in either silver, white, black or red.

[Source: Motor Trend]