Flowmaster

Flowmaster 817891 American Thunder Cat-back Exhaust System

$1,249.95 USD

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Description & Features

Flowmaster 817891 American Thunder Cat-back Exhaust System

This Flowmaster American Thunder® cat-back dual exhaust system for the 2019-2023 GM Silverado/Sierra 1500 (new body style) trucks with the 6.2L engine and factory dual exhaust, is perfect for the person looking for an aggressive sound level outside the truck, with a moderate interior tone and all the performance benefits you would expect from Flowmaster®. This emissions-legal bolt-on system fits all 6.2L Crew Cab with 5.5-ft and 6.5-ft beds, and all Double Cab with a 6.5-ft bed and factory dual exhaust tailpipes. Features include a mandrel-bent 3.50-inch stainless steel inlet tube flowing into a single 50 Series HD™ muffler, dual 2.50-inch mandrel-bent stainless tailpipes replacing the factory resonators and giving your truck some growl. The tailpipes are finished off with quad 4.00-inch black ceramic coated stainless steel tips that exit in place of the factory bolt-on exhaust bezels giving your truck an aggressive performance style and setting your truck apart from others, sending the message that you would rather lead than follow. Designed for an easy fit, this system includes all necessary parts, detailed instructions and hardware for an easy at home installation. Notes: Fits 147-inch and 157-inch wheelbases with 6.2L engine and factory dual tailpipes. Only fits models with factory bumper cutouts.

Large 4.00-inch Black Ceramic Coated Tips
Removes Factory Resonators in Tailpipes
Large 50 Series HD Performance Muffler
Moderately Aggressive Exterior Tone
Black Ceramic Coated Quad Tips
Full Stainless Steel Construction
Uses Factory Hanger Locations
Lifetime Limited Warranty

Specifications

Brand	Flowmaster
California Proposition 65	Yes
California Proposition 65 Chemical Name	Chromium (hexavalent compounds)
CARB (California) Compliant	Yes
Catalytic Converter Included	No
Catalytic Converter Quantity	0
Category	Exhaust
Clamping Type	Flat Band
Clamps Included	Yes
Emission Code	5
Exhaust Series	American Thunder
Exhaust Tip Color	Black
Exhaust Tip Connection	Welded
Exhaust Tip Cut	Angled
Exhaust Tip Diameter	4.00
Exhaust Tip Edge	Angle Cut
Exhaust Tip Finish	Black Ceramic Coating
Exhaust Tip Intercooled	No
Exhaust Tip Length	7.50
Exhaust Tip Material	304 Stainless Steel
Exhaust Tip Quantity	4
Exhaust Tip Resonated	No
Exhaust Tip Shape	Round
Exhaust Tip Wall	Single Wall
Exit Style	Dual Out Rear
Finish	Natural
Gasket Or Seal Included	No
Grade Type	Performance
Hangers Included	Yes
Inlet Type	Clamp-On
Main Piping Diameter	2.50
Mount Type	Uses Factory Hangers
Mounting Bracket Included	No
Muffler Body Height	5.00
Muffler Body Length	18.00
Muffler Body Material	409 Stainless Steel
Muffler Body Shape	Oval
Muffler Body Width	10.00
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	2
Muffler Quantity	1
Muffler Series	50 Series HD
Muffler Type	Chambered
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
Tail Pipe Quantity	Dual
Tail Pipe Tapered Outlet	No
Type	Cat-Back
Valve Included	No
Valve Type	Not Applicable
Warning	California Proposition 65

Packaging Information

Weight: 61.4 lbs
Dimensions: 62.75 x 18.5 x 14.5 IN

Safety

⚠ WARNING: This product can expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information visit www.P65Warnings.ca.gov

Warranty

View Warranty (PDF)

Installation Instructions

View Installation Instructions (PDF)

⚠ Fitment Notes

Polished Tip Finish, Fits Crew Cab and Double Cab Trucks
Fits 2019-2023 Chevrolet Silverado 1500 and GMC Sierra 1500 Crew Cab and Double Cab models with 6.2L engine. Does not fit models with the Multimatic suspension option.