Mazda 6 port rotary engine build | Colorado speed shop
Racing Beat - Holley 13B 6-Port manifolds are almost ready for porting and polishing! Pushing hard to get these completed and out the door, hopefully start to ship next week. | Facebook
RX8 4 & 6 Port 48mm IDA Manifold - Race Cast Engineering
WEBER IDA MANIFOLD for 13B 6-PORT 86-92 - Mazdatrix