Flowmaster® (09-13) Silverado/Sierra 409SS FlowFX 3.0" to Dual 2.5" Cat-Back System

  • Sale
  • Regular price $479.95

Compatible: (5.3L)

2009 - 2013 Chevy Silverado 

2009 - 2013 GMC Sierra


This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.


The new Flowmaster® FlowFX® cat-back exhaust system for the 2009-2013 GM Silverado/Sierra 1500 trucks with the 5.3L engine is manufactured using durable 409 stainless steel throughout and features 3.0-inch to dual 2.50-inch mandrel bent pipes for better exhaust gas flow, and a FlowFX "straight-through" muffler for a great aggressive sound level and maximum performance. The system is finished off with dual 4.0-inch diameter black ceramic-coated 304S stainless steel Flowmaster logoed tips exiting in front of the rear tire, giving your truck a custom look that goes hand in hand with that deep performance FlowFX sound. The system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home. Backed by Flowmaster's lifetime Limited Warranty.


  • Increases of up to 10 hp and 11 lb./ft. over the stock exhaust
  • 3.0-inch and 2.5-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
  • Includes two large 4.0-inch black ceramic coated tips with the Flowmaster logo on them, exit in front of the rear tire for an aggressive and stylish look
  • Includes complete hardware and factory styled hangers in the stock locations for an easy installation
  • FlowFX “straight through” performance muffler delivers a deep, aggressive performance tone and improves exhaust flow
  • Backed by Flowmaster’s Lifetime Limited Warranty

Brand Flowmaster
Emission Code 5
Exhaust Series FlowFX
Exit Position Dual Out Same Side
Mount Type Uses Factory Hangers
Muffler Body Length (in) 18
Muffler Color Natural
Muffler Finish Brushed
Muffler Inlet Diameter 3.00
Muffler Inlet Location Centered
Muffler Material 409S Stainless Steel
Muffler Outlet Diameter 2.50
Muffler Outlet Location Dual Outlet
Muffler Overall Length (in) 24
Muffler Part Number Kit Only
Muffler Quantity 1
Muffler Series FlowFX
Muffler Shape Oval
Muffler Type Absorption
Product Type Exhaust System
Single Dual Dual
Sound Level Aggressive
System Type Cat-back
Tip Cut Angle
Tip Diameter 4.00
Tip Edge Style Cut
Tip Finish Black Ceramic
Tip Length 5.25
Tip Logo Laser
Tip Material 304 Stainless
Tip Quantity 2.00
Tip Shape Round
Tip Style Double Wall
Tubing Diameter (in) 2.50
Tubing Material 409S Stainless Steel
California Proposition 65 Required Yes
Part Number 717929

Install Guide: