Sale

Exhaust› Exhaust Pipes, Systems and Components

Flowmaster

American Thunder Cat-Back Exhaust System 1999-2007* (*Classic Body Only) Chevrolet Silverado/Gmc Sierra 1500 With 4.3L, 4.8L, 5.3L Engines Aluminized Steel Aggressive To Moderate Sound Flowmaster

$979.95 $899.95 Save $80.00

SKU: F00L 17435

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 (Part #: 17435) is designed to boost your truck's sound and performance. It produces a moderate-aggressive exhaust tone with the classic Flowmaster sound. Each system features large-diameter, mandrel-bent piping, high-flow mufflers, and minimal restriction for dyno-proven performance increases. These systems are available in durable aluminized steel or premium stainless steel for excellent corrosion resistance. Most systems require zero welding, offering a simple, bolt-on installation with standard hand tools. Each kit includes vehicle-specific tubing, mufflers, clamps, hangers, exhaust tips, and all necessary hardware.
Show original supplier description

Part #: 17435

For the person who is looking for an aluminized steel cat-back exhaust system with an aggressive exterior tone and moderate interior tone. The American Thunder system is heavy 16-gauge mandrel-bent aluminized steel tubing for durability and maximum performance.Includes a Super 50 Series performance muffler for that perfect blend of a deep aggressive exterior sound, with a moderate interior tone that won't drive you out of the cab when having a conversation. The dual 2.50-inch tailpipes clear the factory spare tire and give you two choices of exit locations. Straight out the back for that true dual look, or exiting out each side behind the rear wheels, which is ideal for towing. The system is finished off with a pair of 3.00-inch diameter highly polished 304 stainless steel tips embossed with the Flowmaster name. Designed for an easy fit, these systems include all necessary parts, hardware and instructions for an easy installation you can do at home. Covered by our 3-year Limited Warranty. For those who prefer full stainless steel construction with a Lifetime Limited Warranty, check out part #817435. Notes: Fits standard cab/short bed models, 119-inch wheelbase only. *Fits 2007 Classic body onlyModerate to Aggressive Sound Exterior Exhaust ToneIncludes Hangers and Hardware for Easy InstallationMandrel-bent 16-gauge Aluminized Steel TubingDyno-tuned for Maximum Performance3.00-inch Polished Stainless Steel TipsSuper 50 Series Performance MufflerUses the Factory Hanger LocationsQuick and Easy Installation3-year Limited WarrantyDeep Powerful Sound

Features:

  • Moderate to Aggressive Sound Exterior Exhaust Tone
  • Includes Hangers and Hardware for Easy Installation
  • Mandrel-bent 16-gauge Aluminized Steel Tubing
  • Dyno-tuned for Maximum Performance
  • 3.00-inch Polished Stainless Steel Tips
  • Super 50 Series Performance Muffler
  • Uses the Factory Hanger Locations
  • Quick and Easy Installation
  • 3-year Limited Warranty
  • Deep Powerful Sound

1999-2007* (*Classic body only) Chevrolet Silverado/GMC Sierra 1500 with 4.3L, 4.8L, 5.3L engines. Aluminized Steel - 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 17435
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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