Flowmaster 40 series mufflers, the original two chamber Flowmaster muffler! Flowmaster 42441, 42541, 42443, 42543, 430402. Preferred by Mustang other muscle car owners. Flowmaster 40 series mufflers feature all welded steel cases (no stamped seams to blow out) with internal chambers to dampen sound. (no fiberglass packing to blow out)Flowmaster 40 series mufflers are made of extra heavy gauge steel, aluminized for rust protection. Flowmaster 40 series two chamber muffler 42441 42541 42443 43543 43042 FlowmasterAPPLICATIONS:: 42441425414244342543430402 Order quickly and easily over the internet on our secure YAHOO! system 24 hours per day or talk to a real, live sales person at 419-331-2470 during our business hours. WE TAKE ORDERS to CANADA. For ordering information, click on "Orders to Canada" at the top left side of this page. LOW COST SHIPPING! Just $12.95 to ship your entire order by U.P.S. ground within the continental United States. Purchase any quantity of items and you pay just $12.95 to have it shipped! The more you order, the more you save! Orders to Hawaii, Puerto Rico, Virgin Islands, and some parts of Alaska will have shipping added due to having to be shipped by air freight. Customers from these states will be emailed the shipping costs for approval before we ship the order. We use Postal Priority for APO and FPO addresses only. Additional shipping charges may apply to APO or FPO addresses. Payment Methods: CREDIT cards or DEBIT cards VISA, MASTERCARD, DISCOVER, AMERICAN EXPRESS, MONEY ORDERS.