Flowmaster 817853 Cat-Back Exhaust System American Thunder fits 2019 GM Silverado and Sierra 1500

SKU: 817853
Fits 2019 GM Silverado/Sierra 1500 with 5.3L engine and factory single exhaust option (Does Not Fit Crew Cab 2WD with 2 Pc Driveshaft, 2019 LD/Classic body or trucks with factory dual exhaust tailpipes.)
Price: $799.95
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Verify This Part Fits Your Vehicle

Note 1: Does Not Fit Crew Cab 2WD with 2 Pc Driveshaft, 2019 LD/Classic body or trucks with factory dual exhaust tailpipes.


Flowmaster's American Thunder Cat-back exhaust system is perfect for the person looking for deep, powerful sound outside the vehicle with a little growl inside the cab. This emissions-legal system for 2WD and 4WD 2019 GM 1500 series trucks (new body style) with the 5.3L V8 engine and factory single exhaust features full stainless steel construction, a single in/dual outlet Super 40 Series muffler, and mandrel-bent dual 2.50-inch 409 stainless steel tailpipes for maximum performance and sound. This bolt-on system utilizes factory hanger locations and includes your choice of tailpipe exits, either dual out the rear exiting under the bumper, or dual out the side behind the rear wheels to help prevent blowing exhaust on your boat or trailer when towing. The system is finished off with a pair of large 3.50-inch double wall polished 304 stainless steel tips. Designed for a perfect fit, the system includes installation instructions and all the necessary hardware for an easy at home installation. Note: Fits crew cab and double cab models. Does not fit crew cab 2WD with 2-piece driveshaft, 2019 LD/classic body or trucks with factory dual exhaust tailpipes.

  • Large 3.50 inch Polished 304 Stainless Tips
  • Deep, Powerful Performance Tone
  • Full Stainless Steel Construction
  • Easy Installation
Sound LevelModerate/AggressiveExit PositionDOR/S
Mount TypeUses factory hangersTubing Material409S Stainless Steel
Tubing Diameter (in)2.5System TypeCat-back
Exhaust SeriesAmerican ThunderSingle DualDual
Muffler SeriesSuper 40 SeriesMuffler TypeReflection
Muffler Overall Length (in)19.5Muffler Body Length (in)13.5
Muffler ShapeOvalMuffler Material409S Stainless Steel
Catalytic Converter IncludedNoMuffler FinishPainted
Muffler Part NumberKit OnlyMuffler ColorBlack
Muffler Quantity1Muffler Inlet Diameter (in)3
Muffler Outlet Diameter (in)2.5Muffler Inlet Locationcentered
Muffler Outlet Locationdual outletTip StyleDouble wall
Tip ShapeRoundTip Material304 Stainless
Tip FinishPolishedTip LogoEmbossed
Tip CutAngleTip Edge StyleCut
Tip Diameter (in)3.5Tip Length (in)13
Tip Quantity2Heat ShieldNo
 California Proposition 65 Information

WARNING: This product can expose you to chemicals including Nickel (metallic) and Chromium (hexavalent compounds) which are 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)

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