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Hooker Aero Chamber Muffler

The Aero Chamber Muffler produces a deep throaty powerful sound that will not change with time. Fits 3rd Gen Camaro/Firebirds. Single 2-1/2" Inlet. Dual 2-1/4" Outlets

Vehicle Type
  • Classic Muscle Car
  • Late Model Muscle Car
  • Street/Strip
  • Street Rod
  • Truck/SUV

PART# 21721HKR

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The all aluminized and stainless steel Aero Chamber is designed to do much more than simply muffle exhaust noise. The Aero Chamber Muffler produces a deep throaty powerful sound that will not change with time. The Hooker Aero Chamber uses a unique step principal, similar to that which is currently popular in racing header design. The aerodynamically designed chambers flow 23% better and produce more horsepower and torque than the most popular high performance brand.


  • Universal Camaro/Firebird Replacement
  • Single 2.5" Offset Inlet
  • Dual 2.25" Outlets
  • 4-3/4"H x 10-1/4"W x 20"L 16 Gauge Aluminzed Steel Case
  • O.E. Mounting Provisions
  • Reinforced Inlets and Outlets
  • Stainless Steel Perforated Plate eliminates Internal Rust
  • Aerodynamic Lens Directs Sound Pressure Waves into Acceleration Chamber and Out of Muffler
  • Sound Absorption Chamber eliminates High Frequeny Sound Waves for Deep Throaty Powerful Sound
  • Resonance Chamber and Tuning Tube Cancels Unwanted Frequencies and Amplitudes
  • Stepped acceleration Chamber Increases Exhaust Gas Velocity and Maximum Flow
  • Three Internal Bulk Heads for Superior Case Durability and Stability


Automotive Item GradeHigh Performance
Body Height (in)4.75
Body Length (in)20
Body Width (in)10.25
Emission Code5
Inlet Connection TypePipe Connection
Inlet Diameter (in)2.5
Inlet PositionCenter
MaterialAluminized Steel
Muffler SeriesAero Chamber
Muffler TypeChambered
Outlet Connection TypePipe Connection
Outlet Diameter (in)2.25
Outlet PositionDual
Overall Length (in)17
Product TypeStreet Mufflers
Sound LevelAggressive Sound
Type of MufflerChambered
Vehicle TypeClassic Muscle Car
Late Model Muscle Car
Street Rod
Part Number21721HKR



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.

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