CSP SAVINGS!

CSP2026
1 5

Flowmaster 817451 - Cat-back System 409S - Single Side Exit - Force II - Mild/Moderate Sound

Flowmaster  |  SKU: FLO-817451
$1,04995 $1,18195

DISCLAIMER: This Item Is Special Ordered, which may have cancellation or return restrictions. Please see our terms and conditions for more information.

PLEASE NOTE: Pictures may be representative of style, rather than the actual product. Read the description for more details.

Description

Flowmaster 817451 - Cat-back System 409S - Single Side Exit - Force II - Mild/Moderate Sound

Exhaust System - Force II - Cat-Back - 3.5 in Tailpipe - 4 in Tips - Stainless - Natural - GM Fullsize Truck 2011-19 - Kit

Force II Cat Back System; Single; Single Side Exit; Incl. 3.5 in. Tubing/50 Series™ Big Block Muffler/4 in. Logo Embossed Stainless Tip; 409 Stainless Steel;

This Force II(R) Cat-back exhaust system is specifically designed for 2011-2019 GM Silverado/Sierra 2500HD/3500HD crew cab/short bed trucks with the 6.0L engine. This emissions legal system is constructed from 3.50-inch mandrel-bent stainless steel tubing flowing into a 50 Series Big Block(TM) performance muffler for a mild to moderate tone inside and moderate sound level outside the truck. The tailpipe exits behind the right rear tire, which is ideal for towing applications, and is finished off with a large 4.00-inch polished stainless steel tip. The system uses the factory hanger locations making for a quick and easy installation. Includes all necessary parts, hardware, and detailed instructions for an easy installation you can do at home. Covered by our Limited Lifetime Warranty. Note: Fits 2 and 4 wheel drive Crew Cab models with the 6.5ft bed.

  • Includes Hangers and Hardware for and Easy Installation
  • Large 4.00-inch Polished 304 Stainless Steel Tip
  • 3.50-inch Mandrel bent Stainless Steel Tubing
  • Connects After Factory Catalytic Converter
  • 50 Series "Big Block" Performance Muffler
  • Uses the Factory Hanger Locations
  • Moderate Exterior Exhaust Tone
  • Quick and Easy Easy Installation
  • Lifetime Limited Warranty
Brand: Flowmaster
CARB (California) Compliant: Yes
Catalytic Converter Included: No
Catalytic Converter Quantity: 0
Category: Exhaust
Clamping Type: Flat Band
Clamps Included: Yes
Drive: 4WD
Drive: 2WD
Emission Code: 5
Exhaust Series: Force II
Exhaust Tip Color: Silver
Exhaust Tip Connection: Welded
Exhaust Tip Cut: Angled
Exhaust Tip Diameter: 4.00
Exhaust Tip Edge: Rolled Edge Angle Cut
Exhaust Tip Finish: Polished
Exhaust Tip Intercooled: No
Exhaust Tip Length: 10.00
Exhaust Tip Material: 304 Stainless Steel
Exhaust Tip Quantity: 1
Exhaust Tip Resonated: No
Exhaust Tip Shape: Round
Exhaust Tip Wall: Single Wall
Exit Style: Single Out Side
Finish: Natural
Gasket Or Seal Included: No
Grade Type: Performance
Hangers Included: Yes
Heat Shield Included: No
Inlet Diameter: 3.50
Inlet Type: Flanged
Main Piping Diameter: 3.50
Mounting Bracket Included: No
Muffler Body Height: 5.00
Muffler Body Length: 22.00
Muffler Body Material: 409 Stainless Steel
Muffler Body Shape: Oval
Muffler Body Width: 12.00
Muffler Finish: Black High-Temperature Paint Finish
Muffler Flanged Inlet: No
Muffler Flanged Outlet: No
Muffler Included: Yes
Muffler Inlet Connection: Slip-Fit
Muffler Inlet Inside Diameter: 3.50
Muffler Inlet Outside Diameter: 3.63
Muffler Outlet Connection: Slip-Fit
Muffler Outlet Quantity: 1
Muffler Part Number: Kit Only
Muffler Quantity: 1
Muffler Series: 50 Series Big Block
Muffler Type: Chambered
part type: Exhaust System
Pipe Color: Silver
Pipe Material: 409 Stainless Steel
Product Type: Exhaust System
Sound Level: Moderate/Mild
Spring Bolt Kit Included: No
Sub Category: Exhaust and Tail Pipes
Tail Pipe Outlet Outside Diameter: 3.50
Tail Pipe Quantity: 1
Tail Pipe Quantity: Single
Tail Pipe Tapered Outlet: No
Type: Cat-Back
Valve Included: No
Valve Type: Not Applicable
Warning: California Proposition 65

What are people saying about CSP?