i baught my new manifold gasket off of amazon for 14 dollars after shipping racing beat is good for the big parts but as far as gaskets and stuff goes i look else where

Sorry, forgot about this thread. The RB SP system is dual back to the muffler and then
single into the muffler with dual tips out.

http://www.racingbeat.com/RX7-1975-1...ems/16422.html

Some folks have run true dual and mounted 2 oval mufflers mounted side by side in place
of the stock or RB muffler. Don't have a pic handy of that. Similar routing.