id America (http://id-case.com/) has a new addition to its brushed aluminum Gasket iPhone 4 case series: the Rally Blue, inspired by rally racing. The new color joins existing colors Aluminum Silver, Titanium Gray, Vintage Gold, Modern Bronze and Jet Black.

In addition, a Carbon Back Skin inspired from automotive performance material carbon fiber, will be released. Coupled with the new case the protective skin offers optimal thickness, all while allowing the Gasket Case to fit perfectly over it, according to Abraham Jackal, marketing manager of id America.

The conceptual muse behind the Gasket case was inspired by the shape of a head gasket on a performance engine. The case provides a secure fit with a brushed aluminum outer skeleton and a suede inner lining.

The Carbon Back-Skin is designed to simulate the texture of actual carbon fiber. The weaved design provides additional grip and more protection for the iPhone 4 device. The skin is easily applied and removed without leaving any residue, says Jackal. Included with all Gasket cases (US$29.99) are front clear protective films, a microfiber cleaning cloth and a squeegee for proper film application.