Flowmaster
Flowmaster 19-25 GM 1500 5.3L FLowFX Direct Fit Active Muffler
Why this price?
$999.95 is MSRP, the lowest price Flowmaster lets us list it at. Additionally, Pro members get 3% to 35% back on most parts.
Special Order
This part is still available to order. Once you place your order, we’ll submit it directly to Flowmaster, and they’ll ship it straight to you.
Delivery times can vary depending on the brand, so we can’t guarantee an exact arrival date. What we can guarantee is that we’ll stay on top of your order, monitor its progress, and keep you updated until it reaches your door.
Special-order items are typically not kept in stock by most retailers. By ordering through us, your order is placed directly with Flowmaster, assuring you get the part as quickly as possible.
Want to get an estimated delivery timeframe before ordering? Contact us through our contact page, and we’ll be happy to find out for you.
Not sure it fits? Read our tips.
Fitment tips
Fitment can come down to more than year, make and model. Sometimes the sub-model decides, so start with the fitment table below.
- Drive type. If your car is all-wheel drive, make sure the part is for all-wheel drive, not rear-wheel drive.
- Engine size. For engine parts, make sure the engine size on the product matches your engine.
- Transmission. Manual and automatic cars often take different parts.
- Body style. Sedan or hatch, two-door or four-door, cab and bed length on trucks.
Manufacturer data can sometimes have imperfections. Still not sure? We are happy to help.
Send us a message and we will confirm the fit.
Couldn't load pickup availability
Introducing the new Flow FX® Active Dual-mode muffler featuring our new W.A.V.E. Technology™ (Wireless Active Valve Exhaust™) for all 2019-2026 GM Silverado/Sierra 1500 (new body style) with 5.3L engine. This direct-fit replacement muffler has split personalities with a nice performance tone over the stock exhaust system, thanks to the Flowmaster® Flow FX performance muffler. The system also features a high quality wireless controlled actuator valve on the Power Chamber® redirecting exhaust through the turn down, giving you that deep open exhaust sound with just a push of a button. System features include mandrel-bent stainless steel construction leading into the Power Chamber, followed by a round Flow FX performance muffler that easily connects to the factory tailpipe. The Power Chamber houses a wireless controlled valve with a large 3.00-inch turndown dump style tailpipe letting everyone know who the Boss is once activated. Other system features include actuator motor, control unit, two wireless key fobs, all necessary wiring, hardware, and detailed instructions. Maximum dyno gains of 9 hp and 11 lb.ft. at the rear wheels. Note: Fits 2019 (New body) 2/4 wheel drive and all wheelbases.
Installation InstructionsWarranty
- Deep Performance Tone from "Straight-through" Flow FX Muffler
- Max Dyno Gains of 9 hp and 11 lb.ft. of Torque
- Features Flowmasters W.A.V.E. Technology
- Very Aggressive Active By-Pass Sound
- Mandrel-bent Stainless Steel Tubing
- Detailed Installation Instructions
- Wireless Controlled Actuator Motor
- Direct-fit Replacement Muffler
- Includes a High Quality Valve
- Stainless Steel Construction
- Includes Two Key Fobs
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2019-2021 | Chevrolet | Silverado 1500 | Custom |
| 2019-2026 | Chevrolet | Silverado 1500 | Custom Trail Boss |
| 2019-2026 | Chevrolet | Silverado 1500 | High Country |
| 2019-2026 | Chevrolet | Silverado 1500 | LT |
| 2019-2026 | Chevrolet | Silverado 1500 | LT Trail Boss |
| 2019-2026 | Chevrolet | Silverado 1500 | LTZ |
| 2023-2026 | Chevrolet | Silverado 1500 | PPV |
| 2019-2026 | Chevrolet | Silverado 1500 | RST |
| 2019-2021 | Chevrolet | Silverado 1500 | SSV |
| 2019-2026 | Chevrolet | Silverado 1500 | WT |
| 2022 | Chevrolet | Silverado 1500 LTD | High Country |
| 2022 | Chevrolet | Silverado 1500 LTD | LT |
| 2022 | Chevrolet | Silverado 1500 LTD | LT Trail Boss |
| 2022 | Chevrolet | Silverado 1500 LTD | LTZ |
| 2022 | Chevrolet | Silverado 1500 LTD | RST |
| 2022 | Chevrolet | Silverado 1500 LTD | SSV |
| 2022 | Chevrolet | Silverado 1500 LTD | WT |
| 2019-2021 | GMC | Sierra 1500 | AT4 |
| 2019-2021 | GMC | Sierra 1500 | Base |
| 2019-2026 | GMC | Sierra 1500 | Denali |
| 2019-2026 | GMC | Sierra 1500 | Elevation |
| 2022-2026 | GMC | Sierra 1500 | Pro |
| 2019-2026 | GMC | Sierra 1500 | SLE |
| 2019-2026 | GMC | Sierra 1500 | SLT |
| 2022 | GMC | Sierra 1500 Limited | Denali |
| 2022 | GMC | Sierra 1500 Limited | Elevation |
| 2022 | GMC | Sierra 1500 Limited | Pro |
| 2022 | GMC | Sierra 1500 Limited | SLE |
| 2022 | GMC | Sierra 1500 Limited | SLT |
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