O.S. Exhaust Manifold Inside FS-70/FS-91

Tower Stock# LXCA99  •  Manufacturer Stock# 72109500
O.S. Exhaust Manifold Inside FS-70/FS-91 (large view)
Regularly Purchased Together
Although customers also purchased these, compatibility is not guaranteed. Click an item for product details.

Notes from our tech department:
This Exhaust Manifold (header) makes a 90 bend for routing exhaust
inside the cowling or fuselage on a radio controlled airplane. This is
usually used with the EX-502 Silencers. This header is
designed to fit the O.S. FS70 & FS91 engines.


Steel Construction


One 90 chromed exhaust manifold.
One hex nut


Use with EX-502 Silencer


Thread size, both ends: M11x.75 (pitch)
Hex nut size: 14mm
Main pipe outside diameter: 10mm (.39")
Main pipe inside diameter: 8mm (.31")


It has a male threaded portion on one end(w/hexnut) & a female
threaded portion the other end.
NNA 10/27/02

Parts Compatibility
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