This Exhaust Manifold (header) makes a 120° bend for routing
   exhaust outside the cowling or fuselage on a radio controlled airplane.

  This header is designed to fit the O.S. FS70 & FS91 Surpass series engines.

INCLUDES: One 120° chromed exhaust manifold
           (Has male threaded portion on one end & female threads on the other)
          One hex nut
SPECS: Male End
       Thread Pitch    -0.75mm
       Outside Diameter-0.425"(10.8mm)
       Inside  Diameter-0.320"(8.1mm )

       Female End (exhaust connection)
       Thread Pitch    -0.75mm
       Outside Diameter-0.509"(12.9mm)
       Inside  Diameter-0.408"(10.3mm)
===
        Inside Exhaust Pipe Connector
        Outside Diameter-0.509"(10.3mm)
        Inside  Diameter-0.409"(10.3mm)
        Thread Depth    -0.424"(10.7mm)

                                                                   jct4/7/00