FRANKLIN, Mass. /Massachusetts Newswire/ -- RYPOS, Inc., developer, and manufacturer of advanced exhaust filtration systems that reduce particulate matter (PM) from diesel engines, is pleased to announce the release of an active, self-cleaning Diesel Particulate Filter (DPF) for Carrier X4 models 7300 and 7500, 2013 and newer. The post RYPOS Rolls Out CARB Verified Diesel Particulate Filter for Carrier X4 models 7300 and 7500 appeared first on Massachusetts Newswire.