This is the quickest, easiest, and most affordable method of creating and installing dual exhausts on your original flathead Mopar exhaust manifold. You need a 1 1/2″ or 2″ hole saw to open up the bottom of your existing manifold and then you simply bolt on the second dump using the four bolts that hold the intake and exhaust manifolds together.  A do-it-yourself kit with the two flanges and a gasket is $75 ($100 to Canada). You supply the exhaust tube and do your own welding which allows you to position the dump wherever it suits your vehicle. A completely welded second dump unit is $150 ($175 to Canada). Available for both the small family of engines, 218/230 and their larger cousins, 251/265. Prices include shipping to lower 48 US addresses.  Adding a second dump to your existing exhaust manifold doubles the outgoing flow rate while allowing the use of either single or dual exhausts without a balance tube.
 
NOTE:  You will receive a set of flanges and gasket or a welded dump and gasket. You are buying parts to modify your existing exhaust manifold, not a complete exhaust manifold. 
 
PLEASE READ THIS: Instructions and parts lists are emailed at the time you order, you will not receive paper copies in the shipment, check your email spam or junk folder if you do not see them in your inbox.