Group

Tell me what I'm missing, with a '91 13b manifold base plus a 83 upper & mid section I get 21" from face to throttle plates (the optimum length?) . with a "plugs up" installation it all will fit under my cowling, the weight penalty is minimal. Why try to re-engineer what Mazda did?

 

Georges B.( this probably will not have the same effect as the oil injection question)