Flowmaster 817477 American Thunder Cat-back Exhaust System
- 409S stainless, American Thunder system
- Dual rear exit
- Aggressive sound
- Bolt-on installation
- Polished finish
- 48.2 pounds
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A bolt-on stainless cat-back with dual rear exit and an aggressive tone, listed for trucks. No truck model or year appears in the listing, so confirm fitment before ordering.
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ASIN: B0035JHO70Model: 817477Category: Cat-Back Systems
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Overview
Bolting a 409S stainless dual-exit system onto the exhaust behind the catalytic converter gives a truck the American Thunder voice. The listing calls the sound aggressive and the finish polished.
It targets owners who want a louder truck with a straightforward install. The listing leaves out the vehicle list, pipe diameter and tip size, and the warranty says only to check with the manufacturer.
Who it's for
Truck owners who value volume and twin tailpipes and who have confirmed the part number. Commuters wanting a mild tone, or those unsure of their fit, should look elsewhere.
Pros and cons
- Stainless steel construction
- Dual rear exit
- Vehicle list not given
- Pipe and tip sizes not listed
- Warranty terms unclear
Performance notes
Larger, freer-flowing piping behind the converter reduces restriction, and the dual exit splits the flow into two outlets. The tone is set by the muffler design and is described only as aggressive, with no decibel figures.
Specifications
| Brand | Flowmaster |
|---|---|
| Model | 817477 |
| Dimensions & fit | |
| Item weight | 48.2 pounds |
| Construction & materials | |
| Material | 409S stainless |
| Tip finish | Polished |
| Compatibility & installation | |
| Fits | Truck |
| Installation | Bolt-On |
| Other details | |
| Fit type | Vehicle Specific Fit |
| Sound level | Aggressive |
| Exit style | Dual rear exit |
Frequently asked questions
Which trucks does the Flowmaster 817477 fit?
The listing says vehicle specific fit for trucks but names no make, model or year. Check the part number in Flowmaster's fitment guide.
Is the Flowmaster 817477 a full exhaust?
No. It is a cat-back system, so it replaces the exhaust behind the catalytic converter.
How loud is the American Thunder?
The listing calls the sound aggressive and gives no decibel rating.