









🔥 Upgrade your engine’s breathability — because your power deserves premium flow!
The Sutmorly Muffler Exhaust Kit Assembly is engineered for Honda GX340, GX390, and GX420 engines, supporting 11HP to 16HP power outputs. This kit includes a muffler, head shield manifold, and two gaskets, designed for a precise OEM fit to optimize exhaust performance and engine protection. With a 3-month warranty and easy installation, it’s the smart choice for professionals demanding reliability and efficiency in their water pumps, snowblowers, and pressure washers.


























| ASIN | B06XR6MGJ2 |
| Best Sellers Rank | #358,412 in Automotive ( See Top 100 in Automotive ) #318 in Automotive Replacement Exhaust Mufflers |
| Brand | Sutmorly |
| Customer Reviews | 4.1 4.1 out of 5 stars (134) |
| Date First Available | March 20, 2017 |
| Global Trade Identification Number | 00714131404360 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4.24 pounds |
| Item dimensions L x W x H | 4.53 x 11.81 x 2.56 inches |
| Item model number | Holzminiaturen_519 |
| Manufacturer | Sutmorly Parts Club |
| Manufacturer Part Number | Holzminiaturen_519 |
| Material | Metal |
| Product Dimensions | 4.53 x 11.81 x 2.56 inches |
| Shape | Round |
| UPC | 714131404360 |
| Vehicle Service Type | Lawn Mower |
C**.
Perfect fit.
Perfect fit. assembles easily. Fastener nuts included.
T**S
Great price great customer service
Great seller would buy from them again
C**I
It fits
Cheep but works
A**Z
good quality, everything fit well
good quality and everything fit well. I'm going to fabricate an extension so I can exit the exhaust from the cowling, just not sure how to accomplish that yet.
M**A
Not a clean fit
Guard plate keeps unit from fitting properly on HS928. First one arrived without pipe. Doesn't come with nuts. Sub-par product all-around.
T**G
Does Fit Harbor Freight 420cc Engine
Does not fit a Harbor Freight GX420 engine. The exhaust manifold is too small and will not bolt onto the engine.
T**.
Perfect fit
Nice, priced well muffler kit
J**R
Mounting studs
Spray studs and mounting nuts and let it soak for a day before replacing muffler. Works and looks great.
M**S
Muffler turned up in great condition, unfortunately missing gasket and pipe
Trustpilot
2 weeks ago
1 month ago