The DU-BRO Exhaust Extensions make it easy to direct engine exhaust exactly where you want it, keeping your RC airplane cleaner and helping protect your fuselage from oil spray. Whether you need a custom-made extension or a direct-fit solution for popular .40–.46 engines, DU-BRO gives you reliable, high-quality options that are simple to install and built to last.
699 – Direct-Fit Muffler Extension
Designed for convenience, this extension fits many popular .40–.46 engines, including ASP, Magnum, O.S., and Thunder Tiger. It includes (2) 3mm x 50mm mounting screws and lines up perfectly with standard muffler bolt spacing (1 7/16" / 36.51 mm). This makes installation fast, clean, and frustration-free.
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Includes screws
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Bolt spacing: 1 7/16"
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Weight: 13 grams
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Perfect for .40–.46 engines
Both exhaust extensions are Made in the USA and built with durability and practical use in mind. Whether you’re customizing a unique setup or need a quick bolt-on solution, DU-BRO Exhaust Extensions help keep your model cleaner and running smoothly.
Product features
Product features
Materials and care
Materials and care
Merchandising tips
Merchandising tips
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