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2016-19 Camaro SS, ZL1 6.2L - American Thunder Dual Mode NPP Exhaust System 817746YouTube Button

Flowmaster American Thunder Axle-back Exhaust System

2016-2020 Camaro SS, ZL1 with 6.2L engine with Factory NPP Exhaust option.

PART# 817746

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$1,355.00   Suggested Retail
$1,218.95   Your Price
Estimated shipping date: 12/07/2020
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Aggressive sound


The Flowmaster® American Thunder® Axle-back system for the 2016-2020 Camaro SS & ZL1 with the 6.2L engine, is perfect for the person looking for a powerful and very aggressive sound quality in Track mode, while maintaining a deep mellow tone for everyday driving. This kit features tandem 40 Delta Flow™ Series mufflers for daily driving, along with a pair of our race-proven Outlaw® mufflers that actually increase the open exhaust sound when in Track mode. The system is finished off with large quad 4.00-inch polished stainless steel tips replicating the factory quad NPP exhaust look. Includes functional exhaust valves to work with the O.E. actuator motors to select between sound levels. The exhaust system is full stainless steel and is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit on both coupe top and convertible models with the factory NPP option (identified by quad tips.) The system includes all necessary parts and hardware for installation. Note: Be sure to check out our Scavenger Series® X-pipes, #81083 for 6-spd manual and #81084 for automatics with factory MDS valves, both designed to replace the factory mid-pipe and the flattened section of the factory tubing.


  • Compatible with Our Scavenger Series Mid-pipe
  • Dyno Tuned For Maximum Performance
  • Deep Powerful Sound in Stealth Mode
  • Aggressive Race Sound in Track Mode
  • Uses the Factory Hanger Locations
  • Includes High Quality Valves
  • Stainless Steel Construction
  • Lifetime Limited Warranty


Catalytic Converter IncludedNo
Emission Code5
Exhaust SeriesAmerican Thunder
Exit PositionDual Out Rear
Heat ShieldNo
Material409 Stainless Steel
Mount TypeUses Factory Hangers
Muffler FinishBlack
Muffler Inlet Diameter (in)3
Muffler Material409S Stainless Steel
Muffler Outlet Diameter (in)3
Muffler Part NumberKit Only
Muffler Quantity2
Muffler Series40 Series Delta Flow, Outlaw
Muffler ShapeOval
Muffler TypeWelded Baffle
Product TypeExhaust System
Single DualDual
Sound LevelAggressive
System TypeAxle-back
Tip CutAngle
Tip Diameter (in)4
Tip Edge StyleCut
Tip FinishPolished
Tip Length (in)5.25
Tip LogoEmbossed
Tip Material304 Stainless
Tip Quantity4
Tip ShapeRound
Tubing Diameter (in)3
Tubing Material409S Stainless Steel
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817746



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

Fits 2016-2019 Camaro SS, ZL1 with 6.2L engine with Factory NPP Performance Exhaust option with Quad Tips.


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