Flowmaster Outlaw Cat-Back Exhaust for 2020+ Silverado/Sierra 2500HD/3500HD - 818112

The Flowmaster Outlaw Cat-Back Exhaust System, part number 818112, is designed for select 2020-2026 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L Gas V8. Built specifically for Crew Cab trucks with the 6.5-foot Standard Bed, this aggressive performance exhaust features a 3.5-inch inlet transitioning to dual 3-inch mandrel-bent 409 stainless steel tailpipes and a compact Super 10 Series muffler. The system can be configured for dual rear or dual side exits and is finished with large 4-inch polished stainless steel tips.

Key Features & Specs:

• Series: Flowmaster Outlaw
• Type: Cat-back exhaust system
• Engine Compatibility: 6.6L Gas V8
• Truck Compatibility: Silverado / Sierra 2500HD and 3500HD
• Cab: Crew Cab
• Bed: 6.5-foot Standard Bed
• Material: 409 stainless steel
• Inlet Diameter: 3.5-inch
• Tailpipe Diameter: Dual 3-inch
• Tubing Construction: 16-gauge mandrel-bent stainless steel
• Muffler: Flowmaster Super 10 Series
• Muffler Design: Chambered
• Sound Level: Aggressive
• Exit Options: Dual rear or dual side
• Towing Configuration: Side-exit option routes exhaust behind the rear wheels
• Exhaust Tips: Dual 4-inch polished 304 stainless steel
• Tip Style: Angle-cut, double-wall
• Performance: Maximum tested gains up to 9 hp and 9 lb-ft at the rear wheels
• Installation: Uses factory hanger locations
• Included: Clamps, installation hardware, and necessary components
• Part Number: 818112
• Warranty: Flowmaster Lifetime Limited Warranty

Fitment:

Fits applicable 2020-2026 Chevrolet Silverado and GMC Sierra HD trucks with the 6.6L Gas V8, Crew Cab, and 6.5-foot Standard Bed.

• 2020-2026 Chevrolet Silverado 2500 HD
• 2020-2026 Chevrolet Silverado 3500 HD
• 2020-2026 GMC Sierra 2500 HD
• 2020-2026 GMC Sierra 3500 HD

Applicable trims include Custom, High Country, LT, LTZ, WT, ZR2, AT4, AT4X, Denali, Pro, SLE, SLT, and other configurations listed in the manufacturer fitment data.

Fitment Note: This exhaust is specifically listed for Crew Cab trucks with the 6.5-foot Standard Bed and 6.6L gasoline V8. Verify cab, bed length, and engine before ordering.