Parts Camp GX390 muffler exhaust unit viewed head-on, highlighting compatibility with GX engines.
Parts Camp GX390 head shield manifold shown with muffler, protecting exhaust area.
Parts Camp GX390 gasket set close-up, ready for secure seals.
Parts Camp GX390 packaging and included parts ready for replacement projects.
Parts Camp GX390 compatibility chart illustrating fit with GX340, GX390, and GX420 engines.
Parts Camp GX390 installation-ready assembly laid out for straightforward swapping.
Parts Camp brand label on GX390 muffler for easy brand identification and trust.
Parts Camp GX390 muffler exhaust unit viewed head-on, highlighting compatibility with GX engines.
Parts Camp GX390 head shield manifold shown with muffler, protecting exhaust area.
Parts Camp GX390 gasket set close-up, ready for secure seals.
Parts Camp GX390 packaging and included parts ready for replacement projects.
Parts Camp GX390 compatibility chart illustrating fit with GX340, GX390, and GX420 engines.
Parts Camp GX390 installation-ready assembly laid out for straightforward swapping.
Parts Camp brand label on GX390 muffler for easy brand identification and trust.

Parts Camp GX390 Muffler Exhaust Assembly – Fits GX340 GX390 GX420 Engines (11–16 HP)

Overview The Parts Camp GX390 muffler assembly is a purpose-built replacement designed for Honda GX340, GX390, and...
Vendor: Parts Camp
Availability: In stock
£65.94
£65.94
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Parts Camp GX390 muffler exhaust unit viewed head-on, highlighting compatibility with GX engines.

Parts Camp GX390 Muffler Exhaust Assembly – Fits GX340 GX390 GX420 Engines (11–16 HP)

£65.94
Parts Camp GX390 muffler exhaust unit viewed head-on, highlighting compatibility with GX engines.
Parts Camp GX390 head shield manifold shown with muffler, protecting exhaust area.
Parts Camp GX390 gasket set close-up, ready for secure seals.
Parts Camp GX390 packaging and included parts ready for replacement projects.
Parts Camp GX390 compatibility chart illustrating fit with GX340, GX390, and GX420 engines.
Parts Camp GX390 installation-ready assembly laid out for straightforward swapping.
Parts Camp brand label on GX390 muffler for easy brand identification and trust.

Parts Camp GX390 Muffler Exhaust Assembly – Fits GX340 GX390 GX420 Engines (11–16 HP)

£65.94
Description
Description
x

Overview

The Parts Camp GX390 muffler assembly is a purpose-built replacement designed for Honda GX340, GX390, and GX420 engine families. It also suits popular 420cc Predator and Champion engines, offering a reliable path to restore exhaust performance without guessing at compatibility.

What’s included

  • 1 muffler
  • 1 head shield manifold
  • 2 gaskets

OEM references and fit

This muffler replaces OEM part 18310-ZE2-W61 and Stens 105-705, ensuring a familiar mounting footprint and seal geometry for straightforward installation.

Why this matters

  • Compatibility across engine models widens service options for repair shops and DIY enthusiasts alike.
  • All-in-one kit reduces the need to source multiple separate parts, saving time during repairs.

Performance and design notes

The muffler’s shielded head manifold helps manage heat around the exhaust area, while the exhaust path is designed to balance backpressure and flow characteristics. These design cues support steady operation and can help maintain typical engine performance within the expected range for these powertrains.

Real-life use cases

Ideal for mid-season replacements, preventative maintenance, or swap-outs during on-site tune-ups. The setup works well for engines in tractors, small equipment frames, and generator platforms relying on GX/Predator/Champion powertrains.

What to expect from support

Parts Camp offers responsive service; a team member will reply within 24 hours for purchase questions or installation guidance.

Care and installation tips

  • Inspect mounting points for wear before installation.
  • Replace gaskets when reassembling to maintain a proper seal.

FAQ

Q: What engines is the Parts Camp GX390 Muffler Assembly compatible with?

A: Compatible with Honda GX340, GX390, GX420, as well as Harbor Freight Predator 420cc and Champion 389cc/420cc/439cc engines.

Q: What comes in the package for the GX390 muffler?

A: Includes 1 muffler, 1 head shield manifold, and 2 gaskets; OEM reference 18310-ZE2-W61 and Stens 105-705.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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