I built a set of custom tail-pipes and do not want to run the external salsbury rubber flappers.. Anybody have part number or best place to get the internal kind??

first pic..
http://eddiemarine.com/store/cart.ph...duct_list&c=59

thanks thats what I was looking for

hi can anyone tell me which is best the rubber flaper that clamps on the tip or internal flapper plate that is up inside of tip i have a 28ft pantera with twin 496ho with a full tank of gas it sits very low first time i put boat in water i thouht i was sinking reasen i ask is one of the internal plates is missing regards paul