Flowmaster American Thunder Cat-Back Exhaust for 2019+ Silverado/Sierra 1500 - 818113

The Flowmaster American Thunder Cat-Back Exhaust System, part number 818113, is designed for select 2019-2026 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks equipped with the 2.7L engine. Constructed from durable 409 stainless steel, this performance exhaust features a 3.5-inch inlet feeding dual 2.5-inch mandrel-bent tailpipes and a 50 Series Big Block muffler for a deep, moderate Flowmaster exhaust tone. Dual 3.5-inch polished stainless steel tips can be configured for either dual rear or dual side exits, giving the truck multiple exhaust layout options.

Key Features & Specs:

• Series: Flowmaster American Thunder
• Type: Cat-back exhaust system
• Engine Compatibility: 2.7L
• Material: 409 stainless steel
• Inlet Diameter: 3.5-inch
• Tailpipe Diameter: Dual 2.5-inch
• Tubing Construction: 16-gauge mandrel-bent stainless steel
• Muffler: Flowmaster 50 Series Big Block
• Muffler Design: Reflection-style
• Sound Level: Moderate
• Exit Options: Dual rear or dual side
• Exhaust Tips: Dual 3.5-inch polished 304 stainless steel
• Tip Design: Angle-cut, double-wall
• Wheelbase Fitment: 147-inch and 157-inch
• Performance: Maximum tested gains up to 4 hp and 11 lb-ft of torque at the rear wheels
• Installation: Uses factory hanger locations
• Included: Installation hardware and instructions
• Part Number: 818113
• Warranty: Flowmaster Lifetime Limited Warranty

Fitment:

Fits applicable 2019-2026 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks equipped with the 2.7L engine and applicable 147-inch or 157-inch wheelbases.

• 2019-2026 Chevrolet Silverado 1500
• 2022 Chevrolet Silverado 1500 LTD
• 2019-2026 GMC Sierra 1500
• 2022 GMC Sierra 1500 Limited

Compatible trims include select Custom, Custom Trail Boss, LT, LT Trail Boss, RST, WT, Elevation, Pro, SLE, and other applications shown in the manufacturer fitment data.