1 / 6Thrush 17658 Welded Muffler, 2.25-inch inlet and outlet
The Thrush 17658 Welded Muffler is an oval, two-chamber automotive muffler listed with 2.25-inch inlet and outlet connections. Its manufacturer describes a deep, aggressive tone, while installation may require exhaust modifications.
At a glance
- Two-chamber, directional design is described as producing a deep, aggressive exhaust tone.
- The listing gives matching 2.25-inch inlet and outlet sizes.
- Thrush says installation may require welding, fabrication, pipe cutting, or new hangers depending on the vehicle.
Pros and cons
Pros
- The inlet and outlet dimensions are specified, making it easier to compare with existing exhaust pipe sizes.
- The oval chambered design offers an alternative to straight-through mufflers for buyers seeking the described deep tone.
- Fully welded construction and aluminized-steel construction are stated as design features.
Technical specifications
13 specifications| Brand | Thrush |
|---|---|
| Model | 17658 |
| Form factor | Oval |
|---|---|
| Dimensions listed | 50.8 x 25.4 x 12.7 centimetres |
| Weight listed | 4.08 kg |
| Inlet connection size | 2.25 inches |
| Vehicle type listed | Car |
| Material listed | Alloy Steel |
|---|---|
| Construction claim | 100% aluminized and fully-welded for extended durability and wear |
| Chamber design | Two chamber design provides a deep aggresive tone |
|---|---|
| Flow direction | Chambered design with directional, non-reversible flow while flow director technology channels exhaust flow |
| Finish description | High temperature metallic finish or 304 polished stainless steel |
| Listed overall length | Available in 19" overall length |
What to know before buying
Listing details to confirm
The listing describes the material as alloy steel and also characterizes the construction as aluminized steel. It lists a high-temperature metallic finish or 304 polished stainless steel, while manufacturer copy elsewhere describes a painted silver finish. The finish and exact material for this selected unit are therefore inconsistent in the listing. Confirm the selected configuration before buying. The listing also says 19 inches overall length, but supplied dimensions are 50.8 x 25.4 x 12.7 centimetres. Verify the fit, flow direction and required exhaust modifications for your vehicle.
Who is it for?
A good fit for
- Drivers building or modifying an exhaust system who want a chambered muffler with the manufacturer's described deep, aggressive tone.
- Buyers whose setup calls for 2.25-inch inlet and outlet connections and an oval muffler body.
Less suited to
- Buyers who need a confirmed vehicle-specific, bolt-on fit without checking dimensions or installation requirements.
- Drivers seeking a quiet, mild tone, since the manufacturer describes this model as deep and aggressive.
Customer reviews on Amazon
- 5 stars
77% 77% - 4 stars
18% 18% - 3 stars
5% 5% - 2 stars
0% 0% - 1 star
0% 0%
Customer feedback describes satisfaction with the sound and tone, perceived product quality, and value, including comparisons to a Flowmaster. These are reported impressions rather than verified performance findings. They may matter to buyers seeking the deep tone claimed for the two-chamber design, but they do not establish fitment, sound level, or the exact finish of this listing. Aggregate ratings are largely positive, with some three-star ratings, so experiences are not uniformly top-rated.
Positive themes
- Feedback highlights sound and tone, with customers describing the sound favourably.
- Customers also report satisfaction with perceived quality and value.
Frequently asked questions
What are the inlet and outlet sizes?
The listing specifies a 2.25-inch inlet and a 2.25-inch outlet. Confirm they match your exhaust pipes and installation layout.
What sound is this muffler designed for?
The manufacturer describes its two-chamber design as producing a deep, aggressive tone. The listing does not provide a measured sound level.
Is this a direct-fit muffler for my car?
The listing identifies the vehicle type as car but does not establish vehicle-specific fitment. Manufacturer guidance says installation may require welding or fabrication, pipe cutting, or new hangers.
What material and finish should I expect?
The listing has inconsistent material and finish descriptions. It mentions alloy steel, aluminized steel, a high-temperature metallic finish or polished 304 stainless steel, and painted silver. Confirm the selected unit's configuration.
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