40 Series - 2.50" IN(D)/OUT(D) - Aggressive Sound black please see CARB EO# D-550-7

please see CARB EO# D-550-7 for details

This product is compatible with trucks equipped with an S and S Diesel Motorsport DCR conversion kit or the S&S Diesel Motorsport CP4 Disaster Prevention Kit

Thread-In Soft Plugs - Eliminates failure-prone factory soft plugs for enhanced longevity

379258300H

40 Series - 2.50" IN(D)/OUT(D) - Aggressive Sound black please see CARB EO# D-550-7The Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.