This is the New Muscle Pipe specifically tuned for the new OS .91HZ motor. The Align .91H and Align .91HP will also benefit from this pipe as they are essentially the same motor. This pipe is tuned for 3D and for this price and 50% crash replacement makes it a great value!

This is the Nitro Power 55 tuned pipe from GP-Exhaust for OS50, YS50, TT50 and TTR53 engines. Hand made in Germany by a craftsman with over 20 years experience in RC model engine design work and manufacturing the goal of GP-Exhaust is to provide the modeler with the finest exhaust systems available on the market. Dedicated to designing and building the best exhaust systems for helicopters and airplanes they test their products on the latest engines to generate the best performance level. There are many factors which determine whether a model engine runs well, and silencers or tuned pipes are among the most important of them. In addition to muffling the exhaust noise, the silencer or tuned pipe also has an important influence on the performance characteristics of every engine and GP-Exhaust is constantly improving the characteristics of their different exhaust systems to maximize power and reliability. These pipes are carefully crafted with weights similar to the equivalent well-known Japanese tuned pipes, and are significantly lighter than many of their competitors. Simple to install with only two high tensile bolts, the craftsmanship of these pipes equals any and surpasses many of the currently commercially available exhausts! This pipe will fit most 50 size helicopters including the 3D Frenzy, Airskipper, Caliber, Knight 50, Raptor, Sceadu and T-Rex 600N.

This is the Nitro Power 91 tuned pipe from GP-Exhaust for YS 91 engine. Hand made in Germany by a craftsman with over 20 years experience in RC model engine design work and manufacturing the goal of GP-Exhaust is to provide the modeler with the finest exhaust systems available on the market. Dedicated to designing and building the best exhaust systems for helicopters and airplanes they test their products on the latest engines to generate the best performance level. There are many factors which determine whether a model engine runs well, and silencers or tuned pipes are among the most important of them. In addition to muffling the exhaust noise, the silencer or tuned pipe also has an important influence on the performance characteristics of every engine and GP-Exhaust is constantly improving the characteristics of their different exhaust systems to maximize power and reliability. These pipes are carefully crafted with weights similar to the equivalent well-known Japanese tuned pipes, and are significantly lighter than many of their competitors. Simple to install with only two high tensile bolts, the craftsmanship of these pipes equals any and surpasses many of the currently commercially available exhausts! This pipe will fit most 90 class helicopters including the Airskipper, Caliber, Ergo, Freya, Raptor and Sylphide.

This is the Nitro Power 91 tuned pipe from GP-Exhaust for OS 70-91, TT 70-91 and Webra 70-91 engines. Hand made in Germany by a craftsman with over 20 years experience in RC model engine design work and manufacturing the goal of GP-Exhaust is to provide the modeler with the finest exhaust systems available on the market. Dedicated to designing and building the best exhaust systems for helicopters and airplanes they test their products on the latest engines to generate the best performance level. There are many factors which determine whether a model engine runs well, and silencers or tuned pipes are among the most important of them. In addition to muffling the exhaust noise, the silencer or tuned pipe also has an important influence on the performance characteristics of every engine and GP-Exhaust is constantly improving the characteristics of their different exhaust systems to maximize power and reliability. These pipes are carefully crafted with weights similar to the equivalent well-known Japanese tuned pipes, and are significantly lighter than many of their competitors. Simple to install with only two high tensile bolts, the craftsmanship of these pipes equals any and surpasses many of the currently commercially available exhausts! This pipe is designed to fit Odin and T-Rex 700 helicopters.

This kit contains the hardware for a Hatori SB 90 size muffler including gromets, o-rings, deflector and hardware.

Thunder Tiger's deluxe muffler will add more torque to your .30 size engine and give you the ultimate smooth running performance for years to come. Also perfect for the Raptor V2.

The RJX 90 pipe seems to duplicate the power expected from a Hatori pipe and has the same beuatiful finish as well. It comes packaged with headers for both YS or OS motors giving you the option of running either motor with the same pipe. All hardware to install this pipe is included in the package.

Hatori SB-16 Special Muffler. This muffler is a 90 size only muffler. It is longer than the SB-14 and SB-15 but it has the same diamteter which means it can use the same type of aftermarket clamps used on the SB-14 and SB-15. This muffler also has the new style dual baffles.

Specifically designed for the OS .91 SZ and also works well with OS .91HZ F3C as well as the Align 91H and Align 91HP motor. This Hatori pipe yields amazing power from your OS motor. This is the pipe of choice for a lot of top 3D pilots as well as those seeking to get the most out of their motor. This is the pipe of choice for a lot of top 3D pilots as well as those seeking to get the most out of their motor. It comes with everything you need to bolt up.

This pipe is tuned specifically for the YS .91 SR Long stroke moto and yields amazing power from your YS motor! This is the pipe of choice for a lot of top 3D pilots as well as those seeking to get the most out of their motor. The YS .91SR and this Hatori pipe is a well proven powerhouse for you .90 size heli! It comes with everything you need to bolt up.

This is a tuned pipe specifically for the new O.S. .91 F3C competition motor which is the motor packaged with the Trex 700N with the Align label. This pipe is tuned to deliver maximum power and is designed with the Align Trex 700 Nitro in mind.

Sceadu 30 -> 50 Conversion set. Includes muffler motor mount flywheel and clutch bell with liner and pinion. Designed specifically around the Hirobo Sceadu.

One of the best mufflers ever made designed to fit 46 to 50 size engines and is universal to fit on either the left or right side of the helicopter. Features a machined solid header that is welded on the inside and outside of the muffler for proven reliability.

This is the latest version of the popular mp5 series exhaust system for the 50 sized glow engines. The SB refers to stick banger edition themed much like the SB blades. This pipe is for the 3d pilot looking for that added power and engine response in the mid-range so they can stick-bang to their hearts content.

KS 37 is a competition level muffler which can squeeze more power out of your engine while keeping noise levels down. Produced by KSJ specifically for .30 / .37 size engines.

KS 50 is a competition level muffler which can squeeze more power out of your engine while keeping noise levels down. Produced by KSJ specifically for the .50 size engines. Available in left or right versions. More powerful than any high-class muffler. Quieter than any muffler also. It is the muffler which demonstrates the highest performance. Available in both left and right assembly configuration !!!

This key chain exhaust plug will plug to the end of the pipe (use exhaust deflector ) to stop fuel from dropping onto your car’s carpet when you carry your Helicopter around. The plug can also be used to plug the fuel line when fueling or use it to plug your fuel tank when working on your Helicopter. Available in multiple sizes to accommodate your fuel line and exhaust system specifications.

Super value, Great upgrade to the PV0109 with 40% more volume than our original muffler so it is tuned properly for the OS 50 even on 30% nitro. Allows putting the pressure tap on either side of the muffler for use on front or rear engine models. And of course the price is awesome! Includes bolts and metal gasket for 46/50 engines. Best value on the market! 040406 Use the lower engine mounting bolt on the Raptor 50's so there is clearance.

Super value, almost identical to the TT PV0102 except it except it is sized and tuned properly for the OS 32 OR the TT39, and allows putting the pressure tap on either side of the muffler for use on front or rear engine models. And of course the price is awesome! Includes bolts and metal gasket. Best Value you can buy!!!