Flowmaster
Flowmaster 19-25 GM 1500 Truck 5.3L Outlaw Extreme Cat-Back Exhaust System
Flowmaster 19-25 GM 1500 Truck 5.3L Outlaw Extreme Cat-Back Exhaust System
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Flowmaster introduces our Outlaw Extreme stainless steel cat-back exhaust system for the 2019*-2026 (*2019 New Body Only) Chevrolet/GMC Silverado/Sierra 1500 with the 5.3L engine. This system uses an Outlaw series muffler for a deep powerful sound and increased performance. 3.0-inch mandrel bent 409 stainless steel tubing allows for maximum exhaust flow and durability. The system has a turndown style, dump exit right after the muffler to eliminate the over-axle tailpipe. This elimination of the tailpipe helps improve ground clearance and departure angle when you are driving in more extreme off-road situations. This system produced max dyno gains of 15 hp and 20 lb.ft. at the rear wheels. All of the necessary hardware is included, and factory-mounting locations are used for an easy installation. Backed by Flowmaster's Lifetime Limited Warranty.
- 3.0-inch 16-gauge Mandrel Bent Stainless Steel Tubing Helps Maintain Maximum Exhaust Flow for Better Power
- 409 Stainless Steel Construction Delivers Extra Durability and Improved Long-Term Corrosion Resistance
- Outlaw Series Performance Muffler Offers a Deep Powerful Sound and Increased Performance
- Dump Style Exit Allows for Better Ground Clearance When in Extreme Off-Road Conditions
- Includes all Necessary Hardware for an at Home Installation
- Max Dyno Gains of 15 hp and 20 lb.ft. at the Rear Wheels
- Uses Factory Hanger Locations for Easy Installation
- Lifetime Limited Warranty
Vehicle Fitment
- 2019-2026 Chevrolet Silverado 1500
- 2019-2026 GMC Sierra 1500
- 2022 Chevrolet Silverado 1500 LTD
- 2022 GMC Sierra 1500 Limited
Please verify exact fitment for your trim and engine before ordering.
🚚 Vendor Direct Shipment: This item is not stocked in our warehouse and ships directly from the manufacturer. Please allow additional handling time before dispatch.
Manufacturer Part Number: 817965
Images are for illustrative purposes only. Actual product may vary.
⚠ WARNING (California Proposition 65): This product can expose you to chemicals which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
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Manufacturer's Warranty — Flowmaster
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Manufacturer's Warranty — Flowmaster
Flowmaster warranty is tiered by material and product line. Lifetime Limited Warranty — stainless steel mufflers (FlowFX series excepted), all stainless steel exhaust systems (FlowFX included), stainless steel pipes, air intake kits and oiled-type filters (cleaning kits excepted), and other stainless steel exhaust accessories (exhaust tips and racing products excepted); this runs for the life of the original vehicle the part was installed on. Three (3) years — aluminized steel mufflers, exhaust systems and pipes, all exhaust tips, other non-race exhaust accessories, and commercial-vehicle applications of aluminized or stainless products. Two (2) years — Delta Force dry air intake filter elements. One (1) year — FlowFX series mufflers, Elite Series headers, and electronic components such as Delta Boost modules. Catalytic converters sold under the Flowmaster brand are excluded from this warranty. Coverage runs from the date of original purchase, to the original purchaser only, and only while the part remains on the vehicle it was originally installed on. Header coverage does not extend to damage caused by exhaust insulating wrap and is void if the header was fitted to a new or rebuilt engine during the initial break-in period. Sound-absorbing material inside “straight-through” mufflers degrades over time; Flowmaster treats that as normal wear, not a material defect. Also excluded: interior and exterior sound levels, cosmetic issues such as coatings and material discoloration, installation on a racing vehicle, improper installation or installation contrary to Flowmaster instructions, alteration, misuse, repair, accident, collision, undercarriage road impact or debris, and willful or negligent acts. To claim, the original purchaser returns the product either to the original retailer or directly to Flowmaster — a Returned Material Authorization (RMA) number must be obtained from Flowmaster first if returning to them — with proof of purchase showing place, price, product and date. Flowmaster's remedy is exchange for the same part number or refund of the purchase price at its option; installation, labor, towing and shipping costs are not covered.
Warranty terms are set by the manufacturer and may change. Full details and claims are handled directly by Flowmaster. Contact us if you need help with a warranty claim.

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