Sale

Exhaust› Exhaust Pipes, Systems and Components

Flowmaster

American Thunder Cat-Back Exhaust System 1999-2004 Ford Mustang Cobra With 4.6L Dohc Engine Aggressive To Moderate Sound Flowmaster

$1,037.95 $949.95 Save $88.00

SKU: F00L 17248

In Stock
In Stock
Ships by Oct 7
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Flowmaster American Thunder Exhaust System is designed to boost the exhaust note of vehicles that have become quiet and unenthused. It aims to restore the classic Flowmaster sound with a moderate-aggressive tone. The system is engineered for performance increases, featuring large-diameter mandrel-bent piping, high-flow mufflers, and minimal restriction. It is available in durable aluminized steel or premium stainless steel for corrosion resistance. Most systems are designed for a straightforward, bolt-on installation with little to no drilling or welding, including all necessary components like vehicle-specific tubing, mufflers, clamps, hangers, exhaust tips, and hardware.
Show original supplier description

Part #: 17248

For the person who wants the look of a traditional dual exhaust system with all the benefits that a Flowmaster Cat-back exhaust system provides. This dual out American Thunder cat-back exhaust system is the perfect choice with a 2.50-inch flanged pipe connecting directly to the catalytic converters, the mandrel-bent aluminized steel inlet tubes flow into a large case Super 40 Series performance mufflers for a deep powerful sound.The system uses the factory hanger locations for an easy installation and features dual 2.50-inch mandrel-bent tailpipes exiting out the back and are finished off with dual 3.00-inch polished stainless steel tips for a muscular look and sound. American Thunder systems deliver a moderate to aggressive exterior tone with a mild-moderate interior tone and are best suited for the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Comes with our 3-year Limited Warranty. If you prefer a full stainless steel exhaust system with a Lifetime Limited Warranty, check out system #817248.Includes Hangers and Hardware for an Easy InstallationMandrel-bent 16-gauge Aluminized Steel TubingIncludes 3.00-inch Polished Stainless Steel TipsCovered by our 3-year Limited WarrantyDyno Tuned for Maximum PerformanceSuper 40 Series Performance MufflersOver 35+years of Flowmaster QualityUses the Factory Hanger LocationsModerate Exterior Exhaust ToneQuick and Easy Installation

Features:

  • Includes Hangers and Hardware for an Easy Installation
  • Mandrel-bent 16-gauge Aluminized Steel Tubing
  • Includes 3.00-inch Polished Stainless Steel Tips
  • Covered by our 3-year Limited Warranty
  • Dyno Tuned for Maximum Performance
  • Super 40 Series Performance Mufflers
  • Over 35+years of Flowmaster Quality
  • Uses the Factory Hanger Locations
  • Moderate Exterior Exhaust Tone
  • Quick and Easy Installation

1999-2004 Ford Mustang Cobra with 4.6L DOHC engine. - Aggressive to moderate sound

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandFlowmaster
Part NumberF00L 17248

About MOTORMIA

5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy