2010 Chevrolet Camaro GS Racecar Concept

Despite the fact that it's the Official Vehicle of SEMA, the Chevy Camaro will not be present in large numbers this week at the largest automotive aftermarket show in the world. That's because, unlike the Dodge Challenger, the Camaro is still a few months off from being delivered to showrooms (though orders are being accepted). Because of this, Chevy itself will be carrying the custom banner on behalf of the Camaro and has debuted four concepts today we'll see in person on Tuesday at the show.

For real race fans, the Camaro GS Racecar Concept should conjure memories of Mark Donahue's blue-and-yellow Trans Am Series Camaro. This modern interpretation features a carbon fiber hood, trunk lid, doors and fenders to keep weight down and is powered by a production LS3 V8 mated to a Tremec 6060 six-speed. A 3-inch exhaust with Coast Fab mufflers, C&R racing aluminum radiator and coolers for the engine oil, transmission and differential round out the racing pedigree.

2010 Chevrolet Camaro Dale Earnhardt Jr. Concept

Despite the fact that it's the Official Vehicle of SEMA, the Chevy Camaro will not be present in large numbers this week at the largest automotive aftermarket show in the world. That's because, unlike the Dodge Challenger, the Camaro is still a few months off from being delivered to showrooms (though orders are being accepted). Because of this, Chevy itself will be carrying the custom banner on behalf of the Camaro and has debuted four concepts today we'll see in person on Tuesday at the show.

This car is the Dale Earnhardt Jr. Concept, which was actually produced with input from Jr. himself. The base car is a Camaro SS tuned to drink higher-octane E85. The exterior is a nostalgic gray-over-white paint scheme with 21-inch five-spoke wheels, a dovetail spoiler and other Chevy Accessories exterior mods.

Group Five Limited Challenger Speedster

There are certain to be dozens of variations of Challengers at this year's SEMA show, some will be versions that Dodge may not be interested in producing. One of the biggest is chopping the roof off, which Dodge won't do because of cost and weight considerations.

But for the lovers of open air motoring, anything can be done. We already reported on one converted 'vert from Coach Builders LTD, and now we bring you sketches of a second one, from Group Five Limited.

This Challenger 'vert comes sans top and with a cut-down windshield for that classic "speedster" profile. Other body mods clean up the front and rear fascias for a true shaved, custom look.