The Flowmaster® Flow FX® Cat-Back Exhaust System is designed for 2014–2019* (Classic body) GM Silverado 1500 and Sierra 1500 Crew Cab and Double Cab models equipped with the 5.3L engine. Built from durable 409 stainless steel, this system features a 3.00-inch inlet pipe flowing into a single-inlet, dual-outlet straight-through Flow FX muffler for maximum performance and a deep, aggressive-to-moderate tone.

Dual 2.50-inch mandrel-bent tailpipes angle out behind the rear wheels, helping direct exhaust away from boats or travel trailers while towing. A pair of large 4.50-inch black ceramic-coated 304 stainless steel tips complete the look with a bold, custom appearance. The system uses factory hanger locations and includes an additional hanger for the left-side tailpipe. Installation instructions and all necessary hardware are included for an easy at-home installation.

Fitment

• Fits 2014–2019 Chevrolet Silverado 1500 with 5.3L engine
• Fits 2014–2019 GMC Sierra 1500 with 5.3L engine
• Fits 2019 Classic body models
• Fits Crew Cab models
• Fits Double Cab models
• Fits 2WD and 4WD models
• Fits 143.5-inch wheelbase
• Fits 153-inch wheelbase
• Dual side exit
• Uses factory hanger locations

Features

• Large 4.50-inch black ceramic-coated stainless steel tips
• Flow FX straight-through performance muffler
• Deep, powerful exterior tone
• Clears the factory spare tire
• Full mandrel-bent stainless steel construction
• Includes additional hanger for left tailpipe
• Easy at-home installation
• Uses factory hanger locations

Specifications

• Brand: Flowmaster
• Catalytic Converter Included: No
• Catalytic Converter Quantity: 0
• Category: Exhaust
• Clamping Type: Flat Band
• Clamps Included: Yes
• Exhaust Series: FlowFX
• Exhaust Tip Color: Black
• Exhaust Tip Connection: Clamp-On
• Exhaust Tip Cut: Angled
• Exhaust Tip Diameter: 4.50 in
• Exhaust Tip Edge: Rolled Edge
• Exhaust Tip Finish: Black Ceramic Coating
• Exhaust Tip Intercooled: No
• Exhaust Tip Length: 11.00 in
• Exhaust Tip Material: 304 Stainless Steel
• Exhaust Tip Quantity: 2
• Exhaust Tip Resonated: No
• Exhaust Tip Shape: Round
• Exhaust Tip Wall: Single Wall
• Exit Style: Dual Out Side
• Finish: Natural
• Gasket or Seal Included: No
• Grade Type: Performance
• Hangers Included: Yes
• Heat Shield Included: No
• Inlet Type: Clamp-On
• Main Piping Diameter: 2.50 in
• Mount Type: Uses Factory Hangers
• Mounting Bracket Included: Yes
• Muffler Body Height: 4.00 in
• Muffler Body Length: 18.00 in
• Muffler Body Material: 409 Stainless Steel
• Muffler Body Shape: Oval
• Muffler Body Width: 9.00 in
• Muffler Color: Silver
• Muffler Finish: Natural
• Muffler Flanged Inlet: No
• Muffler Flanged Outlet: No
• Muffler Included: Yes
• Muffler Inlet Connection: Slip-Fit
• Muffler Inlet Inside Diameter: 3.00 in
• Muffler Inlet Location: Center
• Muffler Inlet Outside Diameter: 3.13 in
• Muffler Outlet Connection: Slip-Fit
• Muffler Outlet Diameter: 2.50 in
• Muffler Outlet Location: Dual
• Muffler Outlet Quantity: 2
• Muffler Overall Length: 24.00 in
• Muffler Part Number: Kit Only
• Muffler Quantity: 1
• Muffler Series: FlowFX
• Muffler Type: Absorption
• Part Type: Exhaust System
• Pipe Color: Silver
• Pipe Material: 409 Stainless Steel
• Product Type: Exhaust System
• Sound Level: Aggressive / Moderate
• Spring Bolt Kit Included: No
• Sub Category: Exhaust and Tail Pipes
• Tail Pipe Outlet Outside Diameter: 2.50 in
• Tail Pipe Quantity: 2
• Tail Pipe Tapered Outlet: No
• Tip Logo: Embossed
• Type: Cat-Back
• Valve Included: No
• Valve Type: Not Applicable

This system delivers improved sound, enhanced performance, and a clean custom appearance with simple, secure installation.