

Upgrade your engine with a heavy-duty 3/4" NPT Male Exhaust Conversion Adapter designed for the specific engine models listed below.
This adapter converts the original exhaust outlet to a standard 3/4" NPT male thread, allowing the installation of compatible custom exhaust pipes, elbows, extensions, mufflers, and other 3/4" NPT female-threaded exhaust components.
Each adapter is precision TIG welded using a heavy-duty mild steel flange for strength and durability.
294440, 294442, 294446, 294447, 294772, 294775, 294776, 294777
295342, 295346, 295347, 295440, 295442, 295446, 295447, 295772, 295777
296442, 296446, 296447
297340, 297347, 297440, 297447
303437, 303440, 303442, 303445, 303446, 303447, 303707, 303772, 303775, 303776, 303777
304447
305440, 305442, 305445, 305446, 305447, 30544A, 305772, 305775, 305776, 305777
309440, 309447
350442, 350445, 350446, 350447, 350772, 350775, 350776, 350777
351442, 351446, 351447, 351772, 351776, 351777
354445, 354447
355447
356442, 356445, 356446, 356447, 35644A, 356776, 356777
35777A
358447, 358772, 358776, 358777
359447, 359770, 359775, 359777
These verified engine models commonly use exhaust gasket part numbers:
The adapter flange was manufactured to match this exhaust gasket pattern.
3/4" NPT is a nominal pipe thread size. It is not the actual outside diameter of the male threaded section.
The outside diameter of a 3/4" NPT male thread measures larger than 3/4". This is normal for NPT pipe threads and does not mean the adapter is the wrong size.
Please review the NPT thread size chart included in the listing photos before ordering. Confirm that the exhaust pipe, muffler, elbow, extension, or other component you plan to connect has a compatible 3/4" NPT female thread.
Do not determine the NPT size by expecting the outside diameter to measure exactly 0.75".
Please confirm that your complete engine model number appears in the compatibility list above.
Do not order based only on the first three digits of the engine model. The complete model number must match one of the listed models.
Also review the listing photos, exhaust gasket shape, mounting-hole pattern, and NPT sizing chart before purchasing.
Compatibility confirms the adapterβs mounting pattern. Clearance for the complete exhaust system will depend on the equipment, installation area, and components connected to the adapter.
Each adapter is carefully manufactured, TIG welded, and inspected to provide a strong and reliable connection for custom exhaust applications.
Made in the USA.
β Trusted by Small Engine Enthusiasts Nationwide
πΊπΈ Proudly Fabricated in Florida, USA
At AR-EXHAUST, every exhaust system is fabricated with durability, fitment, and performance in mind. We take pride in building quality products right here in the USA and providing the same level of service we would expect ourselves.
βββββ "The person who made this thing is an ARTIST! Worth every penny."
βββββ "Welds are excellent, fit perfectly, and even came with extra hardware."
βββββ "Awesome exhaust, couldn't be happier. Keep up the great work!"
βββββ "Amazing shipping speed. Great product and outstanding seller."
βββββ "100x better quality than expected. Strong construction and professional workmanship."
βββββ "Professional welding, excellent fitment, and premium quality materials."
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AR-EXHAUST | Precision Built Exhaust Systems
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βββββ Worth Every Penny!
"In a world where most things are made poorly, this item far exceeded my expectations. I was shocked by the quality. The pipe is heavy gauge, all the welds are correct, the cut edges are smoothed and finished properly, and it fit perfectly. The craftsmanship and attention to detail are outstanding. I highly recommend this item."
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βββββ Works, Fits, and Sounds Great!
"This exhaust solved the clearance issue I was having and completely changed the sound of my go-kart. The fit was excellent, the construction was solid, and everything installed exactly as expected. A great product and well worth the investment."
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