In 1976 Howe introduced the first aftermarket panel made specifically for stock car racing for the Camaro. Thirty years later Howe is the first to produce a Duct Work System made specifically for IMCA / UMP style modifieds. The Howe system is made in three separate pieces that can be used individually or in combination. The system is made to fit large or small GM Metric frames as well as the popular 70-72 Chevelle. The Howe panels are made with flexible poly-propylene for durability.