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2003 GMC Sierra 1500
1
0
Price Match Guarantee
60-Day Returns
Lifetime Replacement
Price Match Guarantee
60-Day Returns
Lifetime Replacement
Guaranteed to Fit2003 GMC Sierra 1500 Change Vehicle

Flowmaster®
2003 GMC Sierra 1500 - Exhaust System, 5.3/4.3/4.8L Engine, 78.0 In. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant

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$661.95
$817.00Save: $155.05(19%)
Manufacturer #717924
Guaranteed to Fit2003 GMC Sierra 1500 Change Vehicle
Qty:
1

Your Vehicle Fit Details

Vehicle Name
Submodel
Engine
Fitment Information
2003 GMC Sierra 1500
WT
6 Cyl 4.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
SL
6 Cyl 4.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
SLT
8 Cyl 4.8L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
SLT
8 Cyl 5.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
SLE
6 Cyl 4.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
SL
8 Cyl 5.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
Base
8 Cyl 5.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
WT
8 Cyl 4.8L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
SLE
8 Cyl 5.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
SLT
6 Cyl 4.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
WT
8 Cyl 5.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
Base
6 Cyl 4.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
SL
8 Cyl 4.8L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
SLE
8 Cyl 4.8L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
2003 GMC Sierra 1500
Base
8 Cyl 4.8L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant

Highlights

Part:
Exhaust System
Brand:
Flowmaster
Notes:
18 in. Muffler Body Length; 3 in. Muffler Inlet Diameter; 2.5 in. Muffler Outlet Diameter; 24 in. Muffler Overall Length; (1) Muffler Quantity; Natural Muffler Color; Brushed Muffler Finish; Centered Muffler Inlet Location; Dual Outlet Muffler Outlet Location; Oval Muffler Shape; Absorption Muffler Type; Moderate Sound Level; Angle Tip Cut; Rolled Tip Edge Style; Black Ceramic Tip Finish; Embossed Tip Logo; 304 Stainless Tip Material; Round Tip Shape; Single Wall Tip Style
Material:
Made of Stainless Steel
Series:
FlowFX Series
System Type:
Cat-Back
Quantity Sold:
Kit
Warranty:
Lifetime Flowmaster Limited Warranty
Prop 65 Warning:

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Exit Location:
Exit: After Rear Tire (Dual Split Side)
Main Piping Diameter:
2.5 in. Main Pipe
Product Fit:
Direct Fit
Recommended Use:
OE Upgrade
Fitnotes:
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant

Vehicle Fitment Information

Vehicle Name
Submodel
Engine
Fitment Information
1999-2003 GMC Sierra 1500
SL
6 Cyl 4.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
1999-2003 GMC Sierra 1500
SL
8 Cyl 5.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
1999-2003 GMC Sierra 1500
SL
8 Cyl 4.8L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
1999-2004 GMC Sierra 1500
SLE
6 Cyl 4.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
1999-2004 GMC Sierra 1500
SLT
6 Cyl 4.3L
78.0 in. Bed, Extended Cab Pickup, 50 State Legal/California Emission Compliant
Page 1 of 12 | Showing 1 - 5 of 56 results

Product Information

FLOWMASTER FLOWFX AGGRESSIVE STRAIGHT-THROUGH MUFFLER EXHAUST SYSTEM

Flowmaster’s FlowFX aggressive straight-through muffler exhaust systems include 409S stainless steel tubing and a FlowFX straight-through muffler that’s fine-tuned to deliver improved torque, horsepower and gas mileage, plus the aggressive roar you crave for your street machine. Flowmaster, known as ‘the exhaust technology company,’ is a leading manufacturer of performance exhaust systems, respected for their design, innovation and engineering.

  • MADE IN USA
  • Straight-through muffler fine-tunes exhaust tone to aggressive, satisfying roar
  • Designed with 409S stainless steel tubing
  • Quick and easy installation
  • Direct fit by vehicle year, make and model
  • Proven to improve torque, horsepower and gas mileage by rigorous dyno testing
Need help?Call our product expert1-866-529-0412
Chat with us
Mondays - Sundays7am - 11pm ET | 4am - 8pm PT
Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 60 days and we’ll take care of it. Check out our Warranty Policy for more details.
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

Product Q&A

0
What is the differance between a flowmaster muffler and a Thrush Hush Muffler ?RickyJul 05, 2022
Best Answer:Hi Howard, thank you for reaching out. We need more information. Kindly call our parts team at 1-866-529-0412 and provide the parts numbers for the items you are comparing.
Andrew B.STAFFJul 05, 2022