MBRP 4.0" ID to 5" ID x 7" Universal Adapter UA2004
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AVAILABILITY:114 In Stock
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Now you can hook-up to your MBRP 4" and 5" hardware no matter what size your system. This adaptor is built from heavy duty aluminized steel. It has a 4.0 inch Inside Diameter expanding to a 5 inch Inside Diameter.