Although time is definitely running out for the fabled Viper, Dodge has deigned that the "approximately" 500-unit final run of 2010 models to be built between now and July will be a batch to remember. Last week, the heavily-revamped track-ready (ACR) showed its newly sharpened fangs by reclaiming its lap record-holder status at Mazda Raceway at Laguna Seca. This week, it was the standard STR10's turn to bask -- albeit a bit more lightly -- in the limelight. While largely a mechanical carryover, the coupe and roadster make even better use of their 8.4-liter/600-horsepower V10 thanks to a slightly lower fifth-gear ratio in the six-speed manual transmission-a change that improves high-speed acceleration while reportedly knocking 14 seconds off of the car's 0-200 mph times. Beyond that, the SRT10's variations are largely cosmetic. Two new colors, Toxic Orange Pearl and Bright Metallic Clearcoat combine with new wider racing stripes and the rest of the exterior palette to afford buyers over 7,600 possibilities to create a genuine one-off example. Dodge promises that those who favor a prepackaged classic will be able to choose from a number of limited editions, although the only two announced at the show are based on the harder-line ACR. The Viper ACR 1:33 Edition will pay homage to the recent record setter with a two-tone Black Clear Coat/Red Clear Coat exterior that reverses the look of the Laguna car's color scheme. All 33 built will also have unique interior trim. Even more exclusive is a 10-unit "Vooodoo-edition" Viper ACR that matches Black Clear Coat with a Graphite driver's stripe outlined in red and repeats that striping motif on the steering wheel.