SAN FRANCISCO, Dec. 23, 2011 /PRNewswire/ -- Genstar Capital, LLC, a middle market private equity firm that focuses on investments in selected segments of the insurance and financial services, software, life sciences, healthcare, and industrial technology industries, in partnership with several senior IAS executives, today announced the acquisition of Innovative Aftermarket Systems ("IAS" or the "Company"), a premier marketer, administrator and underwriter of vehicle protection products and related services sold through franchised automobile dealers.