Is there such a thing as a one piece sidedraft intake manifold for a 13b 4port. That positions the carb on top of the motor? If so, where do I buy one?

All the 13b 4port manifolds I see are two piece (Racing Beat) or Lake Cities style.

 

^

 

Talk to Robert at www.rotaryshack.com.

 

http://www.rotaryshack.com bad link above......

 

When I had a 13B 4port w/Mikuni sidedraft you used the same 12A manifold with an adapter plate to fit the 13B. I'll bet Racing Beat still sells them (or Mazdatrix).

 

^^ What Tom is speaking of is the Mikuni "Aggressor" System by Rotary Reliability and Racing.

 

^ Yuppers.

Mazdatrix has them- see quote:

"The WEBER 45mm side-draft intake system is an excellent performance upgrade for your RX7. Kits are supplied with carb, filter, and linkage brackets. Note: fuel pump and/or fuel pressure regulator are not supplied. The 12A kits use a one-piece manifold, 13B 4-port kits include the adapter needed to bolt the manifold to the engine. The 6-PORT kits are supplied with the upper manifold, which bolts to the original equipment lower manifold. A low pressure fuel pump is required (not supplied) if the WEBER system is being installed in a formerly fuel injected car. "

http://www.mazdatrix.com/r-weber.htm