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

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


Emission Code5
Muffler TypeChambered
Product TypeMuffler
Type of MufflerChambered
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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    Some parts are not legal for use in California or other states with similar regulations.