The ones on the left are official Mazda racing peripeheral
port housings. The ones on the right are Racing Beat's
versions. The port tubes are bonded into the housing
with high temp epoxy filling the surrounding water jacket
area. Not that hard to do if you have a mill.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org