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Home / Exhaust / Catback / Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System
Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust SystemRepresentative image
Appearance and included parts may differ. Image availability does not confirm fitment or availability.
Flowmaster

Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System

PART 817428CATEGORY Catback
$1,171.95
MSRP $1,318.95You save $147.00
$1,171.95
1

Product information

Manufacturer information. Check the part number and installation requirements for your vehicle.

Supplier details checked 2026-09-23 · Test catalog

Product description

1999-2007* (2007 Classic Only) Chevrolet Silverado, GMC Sierra 1500 4.3L, 4.8L, 5.3L engine, Extended Cab/Short Bed. 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

Moderate to Aggressive Exterior Exhaust Tone

Connects After Factory Catalytic Converter

Super 40 Series Performance Muffler

Uses the Factory Hanger Locations

Lifetime Limited Warranty

Easy Installation

Manufacturer notes

Fits 1999-2007* (*Classic body) Chevrolet Silverado & GMC Sierra 1500 4.3L, 4.8L and 5.3L engine with single-flanged catalytic converter. Fits 2/4 wheel drive with extended cab/short bed with 143.5-inch wheelbase.

Supplier category
Exhaust, Mufflers & Tips
Supplier subcategory
Catback
UPC / barcode
700042024315
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 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System

9906 GM CK 1500 ECSB AMT 409S

SYS 99-06 GM C/K 150

About the manufacturer

This Flowmaster system is for the person who is looking for a stainless steel cat-back exhaust system with an aggressive exterior tone and moderate interior tone for the 1999 to 2007* (2007 Classic Only) GM 1500 Extended Cab/Short Bed trucks with the 4.3L, 4.8L or 5.3L engines. The American Thunder® system is heavy 16-gauge mandrel-bent stainless steel tubing for durability and maximum performance. Includes a stainless steel Super 40™ 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 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.

Additional manufacturer information

SYS 99-06 GM

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Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System | Q40 Motorsports