Flowmaster · New
Flowmaster 19-25 GM 1500 Truck 5.3L Outlaw Extreme Cat-Back Exhaust System
MPN 817965 · Store SKU flo817965
Supplier stock checked 11/8/2026, 4:23:40 AM UTC. Adding a part does not reserve it.
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Product details
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. Fits 2019*-2026 (*2019 New Body) GM Silverado/Sierra 1500 5.3L, Outlaw Extreme High Clearance 3.0" Cat-Back Stainless Steel Exhaust System Flowmaster Outlaw Extreme Cat-Back Exhaust System
Manufacturer fitment & guides
Check 817965 against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- Emissions acknowledgement required before purchase.
- California Proposition 65: Y
