“Flowmaster 99-04 Mustang GT 4.6L American Thunder SS Cat-Back Exhaust System”
“1999-2004 Ford Mustang GT, MACH1 and Bullitt with 4.6L SOHC engine, Stainless Steel - Aggressive to mo...”
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Product information
Manufacturer information. Check the part number and installation requirements for your vehicle.
Supplier details checked 2026-09-23 · Test catalog
Product description
1999-2004 Ford Mustang GT, MACH1 and Bullitt with 4.6L SOHC engine, Stainless Steel - Aggressive to moderate sound
Flowmaster American Thunder Cat-back Exhaust System
Features
Includes Hangers and Hardware for an Easy Installation
Mandrel-bent 16 Gauge Stainless Steel Tubing
3.00-inch Polished 304 Stainless Steel Tips
Super 40 Series Performance Mufflers
Dyno Tuned for Maximum Performance
Uses the Factory Hanger Locations
Moderate Exterior Exhaust Tone
Lifetime Limited Warranty
Manufacturer notes
"Fits 1999-2004 Ford Mustang GT, MACH1 and Bullitt with 4.6L SOHC engine.
Supplier category
Exhaust, Mufflers & Tips
Supplier subcategory
Catback
UPC / barcode
700042022694
Units per product
1
Supplier Proposition 65 status
Y
Supplier EPA status
N/A
Air freight prohibited
No
Not CARB approved
No
CARB acknowledgement required
Yes
Freight delivery required
No
Powersports product
No
More manufacturer information
Other product descriptions
Flowmaster 99-04 Mustang GT 4.6L American Thunder SS Cat-Back Exhaust System
9904 MUSTANG GT 46L AMT 409S
SYS 99-04 MUSTANG GT
About the manufacturer
For the person who is looking for a complete Flowmaster® cat-back dual exhaust system with an aggressive tone. With easy fit in mind, this American Thunder® exhaust system features mandrel-bent 2.50-inch stainless steel tubing for maximum performance and includes a pair of specially selected Super 40® Series performance mufflers. The custom tailpipes feature added clearance and exit in the factory location with large 3.00-inch polished tips. The system uses the factory hanger locations for an easy install and delivers a moderate to aggressive interior and exterior tone, best suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage and are designed for an easy fit. The system includes all necessary parts, hardware and instructions for an easy installation you can do at home.
Additional manufacturer information
SYS 99-04 MU
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