O.S. optional collector exhaust pipe for the O.S. Max IL-300.

O.S. tuned silencer (Tuned Pipe) specifically designed for the OS Max 140 RX 2-Cycle Airplane Engine. It is designed for the engine to develop maximum performance at the relatively lower engine RPM range (between 8,000 RPMs which also enables you to gain noise bonus point).

O.S. optional Max T-2060 WN speed tuned pipe set for the O.S. Max VZ-B V-Spec Engine, and the .30VG Series.

O.S. tuned pipe that is designed for the .61 RF Hanno special engine.

O.S. optional Max T-2060 WN speed tuned pipe for the O.S. Max VZ-B V-Spec Engine, and the 30VG Series.

O.S. optional Max T-2060 WN speed tuned pipe for the O.S. Max VZ-B V-Spec Engine, and the .30VG Series.

O.S. optional speed tuned pipe for the O.S. Max 30VG Engine.

O.S tuned pipe for the .21 size Buggy Engines. It is anodized blue and requires a pressure fitting. This is FEMCA Approved.

OS Max T-1010 tuned pipe (silencer/muffler) for the .15RX and .15/2.5CC 2-cycle engines.

O.S. muffler package contains the muffler for the FS-120. This will work with the FS-120 Surpass II/III

O.S F-4020 muffler assembly used on the OS Max FS 91SII pumped Surpass Engine. The pre-drilled pressure fitting hole is drilled, tapped and 3.4 x 4mm screw is pre-installed to seal the hole.

O.S replacement muffler for the OS BGX-1 3500 and the OS Max 1.60 FX engines.

O.S. Super Silencer Muffler used for the Max 60FP, 61SF and 61FX engines. This muffler will fit on the 91FX but will overheat the motor VERY quickly. DO NOT USE.

O.S replacement muffler for the O.S. 1.20AX series.

O.S. stock replacement muffler body for the O.S. F-5020 muffler which fits the O.S. FS120 Surpass III four-stroke airplane engine.

O.S. #855 muffler for the OS Max .91 & 108 FSR engines. It attaches to the engine by way of the included adapter plate. Adapter plate takes the round/oblong exhaust port that is on the engine, and makes it possible to mount the #855 muffler.

O.S. muffler for the FS-120 Surpass.

O.S. muffler for the OS MAX 91FX Engine. Muffler comes pre-tapped. Do not use on the 61SF and 61FX, this muffler will not provide enough back pressure for proper operation.

O.S. E-2050 muffler used on the O.S. Max .21XM outboard engine.

O.S. replacement muffler for the OS MAX 60FP, 65LA, and 61FX Engines.

O.S Engines 60 Degree In-Cowl exhaust header pipe for use on the FS-200S-P Surpass four stroke engine.

O.S Silencer (Muffler) for the O.S. Max FL-70 4-stroke engine. This silencer assembly threads into the crankcase and muffles the sound of the exhaust.

O.S. optional muffler for the Max .35-.40 FP, .40 LA, .32 F, .32 SX Engines. It is quieter than the E3030 that come with these engines. The muffler mute for the #843 will NOT Fit this Muffler.

O.S #873S super Silencer muffler used for the Max 40FX and 46FX engines.

Muffler and threaded header pipe for the OS Max FS-91 & FS-71 Surpass Engines. The header screws into the head and then the muffler screws onto the header. Using the two included nuts, both are tightened at the desired angle.

O.S muffler body AND header for the FS-52S.

O.S Engines optional 60 degree In-Cowl exhaust header pipe for use on the 56FS-a Ringed w/Muffler.

O.S F-4030 Silencer body by O.S. engines for the FL-70.

O.S. direct replacement muffler for the OS 30 Wankel only. It is made of aluminum, and is of standard expansion type construction.

O.S. replacement E-2030 blue anodized muffler for the .25LA OS engine.

O.S. Silencer assembly for the Max FS-30 Surpass engine.

O.S. Max #873 Muffler.
This Muffler is Designed for the following Engines:
.40SF .40SF ABC .40SF-S ABC
.46SF-H .46SF ABC .46SF-S ABC
.46SF .46SF-HS .46FX Non-Ringed

O.S.Engines makes a line of replacement mufflers in case yours is lost or damaged.

O.S. replacement muffler for the OS MAX 25SF and 25FX engine. Pressure fitting is pre-installed.

O.S. replacement #871 blue anodized muffler.

O.S. muffler included now with the OS 35FP, 40FP and 32F engines. It is quieter than the #843 that used to come with the engine. The muffler mute for the #843 will NOT fit this muffler.

O.S.Engines makes a line of replacement mufflers in case yours is lost or damaged.

OS Max E-2030 muffler for the 20 & 25FP and the 25LA series engines. It features an adjustable outlet to fit various applications. This muffler replaces the #842 OS Max muffler.

O.S. Silencer body (aka: Muffler) for the FS-30 4-stroke engine.