2024-2025
2015-2023
2010-2014
2005-2009
1999-2004
1994-1998
1979-1993
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
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Find Cat-Back Exhaust for your Mustang
Flowmaster American Thunder Cat-Back Exhaust System (99-04 Mustang GT, Mach 1)Find parts that fit my vehicle
Item 18410
$0.00
458 Reviews
23 Answers
Our Price
$646.95
Ship to: 43215
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$299.00
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Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Aggressive Flowmaster Sound.
- Super 40 Series Mufflers.
- 3" Polished Stainless Steel Tips.
- Mandrel-Bent Tubing.
- Durable Aluminized Steel Construction.
- Fits 1999-2004 GT, Mach 1, and Bullitt Mustangs.
| Brand | Flowmaster |
| Exhaust System Type | Cat-Back System |
| Exhaust System Tip Finish | Chrome, Polished |
| Exhaust Loudness | Moderate |
Description
Flowmaster Sound.The Flowmaster American Thunder Cat-Back exhaust system with its mandrel bent tubing will greatly improve your 1999 to 2004 Mustangs exhaust flow for an increase in power, and their included Super 40 Series Mufflers will improve your exhausts sound for a deeper throatier muscle car exhaust note.
Quality Construction. Constructed from mandrel bent 2.5" 16 gauge aluminized steel tubing for it's corrosion resistant properties the Flowmaster American Thunder Cat-Back features their Super 40 Series chambered mufflers with 3.0 " diameter OEM style polished stainless steel tips for great muscle car looks and sound.
Fitment. This Flowmaster American Thunder Cat-Back exhaust system is specifically designed to fit the 1999-2004 GT, 2001 Bullitt, and 2003-2004 Mach 1 Mustangs for both impressive looks and sound. This system will not fit the SVT Cobra Mustangs.
Quality Construction. Constructed from mandrel bent 2.5" 16 gauge aluminized steel tubing for it's corrosion resistant properties the Flowmaster American Thunder Cat-Back features their Super 40 Series chambered mufflers with 3.0 " diameter OEM style polished stainless steel tips for great muscle car looks and sound.
Fitment. This Flowmaster American Thunder Cat-Back exhaust system is specifically designed to fit the 1999-2004 GT, 2001 Bullitt, and 2003-2004 Mach 1 Mustangs for both impressive looks and sound. This system will not fit the SVT Cobra Mustangs.
Flowmaster 17312
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Right muffler assembly
- (1) Left muffler assembly
- (1) Right tailpipe assembly
- (1) Left tailpipe assembly
- (2) Clamps
- (4) Lock Washers
Tech Guides:
4.7
Customer Reviews (458)
Questions & Answers (23)
Will It Fit My Mustang
- Bullitt - 01
- GT - 99, 00, 01, 02, 03, 04
- Mach 1 - 03, 04
Fits GT, Mach 1, and Bullitt
