Mike that is the heat riser ,,,,,,,if you are not sure about it you might be better off going to a muffler shop and having them put a system on, sure would hate it if the system leaked and someone got hurt. and besides exhaust work takes special tools In a message dated 3/30/2009 4:25:13 P.M. Central Daylight Time, mikelj@xxxxxxx writes: Hey folks, I am going to break down and convert my stock single exhaust on my '64 Dodge Polara 500 383 2 bbl. to a dual. Anyone have any opinions on who makes the best, easiest to fit systems from the vendor page or other? Thanks. Also, I have noticed a strange little flap on the end of the stock, passenger side exhaust header as it goes into the exhaust pipe. Seems to open and close the exhaust pipe, is this standard? Thanks. Mike in New Mexico -- [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- direct ly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html. **************A Good Credit Score is 700 or Above. See yours in just 2 easy steps! (http://pr.atwola.com/promoclk/100126575x1220439616x1201372437/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID %3D62%26bcd%3DfebemailfooterNO62) [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.