1" Threaded Exhaust Flange Compatible with Pr-edator 301 420 340 390 22hp 670 Generator or other applications where a custom exhaust
Key features
- •Custom Threaded Exhaust Flange Compatible With Predator 301cc 11hp, 420cc 13hp 670cc 22hp. Honda GX270, GX340, GX390.
- •Multipurpose-Great For Generators Or Other Applications Where a Custom Exhaust is Needed(This Exhasust Adaptor Does Not Work On Duromax Engine 16HP OR 18 HP)
- •Easy to Install - Convenient assembly, This is an un welded DIY kit,Comes complete with stainless steel mounting hardware for a quality installation.
- •Flange is CNC cut from heavy steel plate to prevent warping, outlet pipe is SS NPT 1" pipe thread. Flange center hollow to hollow 1"968 = 50mm (see photos for details)
- •Finding the Correct Pipe Thread Size National Pipe Threads (NPT),to actually determine the size of a pipe, the outside diameter of each pipe or fitting must be measured and compared to the table for size identification. For example, a 1" NPT pipe thread has an outside diameter of 1.308 inches. The 1" NPT pipe thread has 11.5 threads per inch. Both the TPI (threads per inch) and OD (outside diameter) of the thread are required for positive identification of thread size.
1" Threaded Exhaust Flange Compatible with Pr-edator 301 420 340 390 22hp 670 Generator or other applications where a custom exhaust
List Price: $35.66$32.09DEALYou Save: $3.57 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 24, 2026In Stock (1)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.0
out of 5
Based on 6 reviews
5★
33%
4★
67%
3★
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1★
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Excellent buy If you know what you are doing
Redlined✓ Verified Purchase•July 24, 2023
Bought them for a honda gx620.Tge bokt pattern is the same but it's not a direct fit for a gx620(its not supposed to be)To fit a gx620 from you need to grind the flange or head fins to fit it on.Bolts line up and the gaskets work.
To address the thread.It is infacr 1" NPT but whoever threaded it didn't make the cut deep enough.NPT is tapered......if using a die you need to thread it about 1/8" more to taper it enough to actually fit 1"NPT.
I was able to barely start 1 thread by hand.A proper 1"NPT should go atleast 3 threads hand tight.
None the less they worked and helped me out.
Excellent looking construction for sure.
To address the thread.It is infacr 1" NPT but whoever threaded it didn't make the cut deep enough.NPT is tapered......if using a die you need to thread it about 1/8" more to taper it enough to actually fit 1"NPT.
I was able to barely start 1 thread by hand.A proper 1"NPT should go atleast 3 threads hand tight.
None the less they worked and helped me out.
Excellent looking construction for sure.
Product is as pictured.
SueAnn Joplin✓ Verified Purchase•July 23, 2023
Product is as described. I would buy it again.
Worked perfectly
Laura✓ Verified Purchase•June 23, 2023
Worked perfectly along with a $8 muffler I purchased together with this on my 2008 Troy Bilt Bronco Lawn mower after the original muffler blew off. Saved over $100 going this way!
Product is as pictured.
SueAnn Joplin✓ Verified Purchase•June 15, 2023
Product is as described. I would buy it again.
Worked perfectly
Laura✓ Verified Purchase•June 3, 2023
Worked perfectly along with a $8 muffler I purchased together with this on my 2008 Troy Bilt Bronco Lawn mower after the original muffler blew off. Saved over $100 going this way!
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