Flowmaster Signature Cat-Back Exhaust for 2014-2019 Silverado/Sierra 1500 - 737857

The Flowmaster Signature Series Cat-Back Exhaust System, part number 737857, is designed for select 2014-2019 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks with 4.3L or 5.3L engines. Built from premium brushed 304 stainless steel, this system features 3-inch 16-gauge mandrel-bent tubing and a straight-through Signature Series muffler for a deep, moderate performance tone. TIG-welded construction provides precise, durable joints, while the single passenger-side exit is finished with a large 4.5-inch PVD black chrome stainless steel tip for a clean premium appearance.

Key Features & Specs:

• Series: Flowmaster Signature Series
• Type: Cat-back exhaust system
• Material: Brushed 304 stainless steel
• Tubing Diameter: 3-inch
• Tubing Gauge: 16-gauge
• Muffler: Signature Series straight-through absorption design
• Sound Level: Moderate performance tone
• Exit Style: Single side exit behind passenger-side rear tire
• Exhaust Tip: 4.5-inch PVD black chrome 304 stainless steel
• Construction: TIG welded
• Engine Compatibility: 4.3L and 5.3L
• Wheelbases: 143.5-inch and 153-inch where applicable
• Drivetrain: 2WD and 4WD where applicable
• Performance: Maximum tested gains up to 9 hp and 10 lb-ft at the rear wheels
• Installation: Uses factory hanger locations and connections; required hardware and instructions included
• Part Number: 737857

Fitment:

• 2014-2018 Chevrolet Silverado 1500
• 2014-2018 GMC Sierra 1500
• 2019 Chevrolet Silverado 1500 LD
• 2019 GMC Sierra 1500 Limited

Fits listed 2014-2018 applications with 4.3L or 5.3L engines and applicable 143.5-inch or 153-inch wheelbases in 2WD or 4WD configurations.

2019 Fitment Note: Flowmaster identifies 2019 applications as Classic Body models and specifically notes 5.3L, 4WD trucks with a 143.5-inch wheelbase. Verify these configuration requirements before ordering for a 2019 Silverado 1500 LD or Sierra 1500 Limited.