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Street Race Truck More... The Toolbox
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$91.70
$74.28
Hooker 21507HKR Aero Chamber Muffler, 3-1/2 Inch Center In/Out
Hooker 21507HKR Aero Chamber Muffler, 3-1/2 Inch Center In/Out

Hooker 21507HKR Aero Chamber Muffler, 3-1/2 Inch Center In/Out

Universal Fit, Chambered Muffler Type, 3.5" Inlet Diameter, 3.5" Outlet Diameter

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Hooker 21507HKR Aero Chamber Muffler, 3-1/2 Inch Center In/Out
Hooker 21507HKR Aero Chamber Muffler, 3-1/2 Inch Center In/Out
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Part # 42521507HKR
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$74.28
$91.70
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  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.

Details

Muffler Type:
Chambered
Inlet Diameter:
3.5"
Outlet Diameter:
3.5"
Overall Height:
4.75"
Inlet Size:
3.50
Outlet Size:
3.50
Body Length:
14"
MFG. Part #:
21507HKR
Sold in Quantity:
Each
GTIN Code:
700414052458

Info

HolleyDAYS are here again! SAVE up to 20% on this part and hundreds of other Holley brands during the 2018 HolleyDAYS sale 11/15/18-12/31/18.

The raw aluminized 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.

  • 4-3/4"H x 10-1/4"W x 14"L 16 Gauge Raw Aluminzed Steel Case
  • Reinforced Inlets and Outlets
  • Single 3-1/2" Center Outlet
  • Feature intricate stainless steel, robotic weld seams
  • Single 3-1/2" Center Inlet
  • Stainless Steel Perforated Internal Plate Eliminates Internal Rust
  • Sound Absorption Chamber eliminates High Frequeny Sound Waves for Deep Throaty Powerful Sound
  • Aerodynamic Lens Directs Sound Pressure Waves into Acceleration Chamber and Out of Muffler
  • Resonance Chamber and Tuning Tube Cancels Unwanted Frequencies and Amplitudes (No annoying tin can sound or drone at cruising speed)
  • Stepped acceleration Chamber Increases Exhaust Gas Velocity and Maximum Flow
  • Three Internal Bulk Heads for Superior Case Durability and Stability

Installation Instructions (PDF)

Some parts are not legal for use in California or other states with similar laws/regulations

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  • A new motor deserves new exhaust. Click here for a rundown on selecting the best setup!
  • If you're ready to get your street machine sounding as good as it looks, it's important to know how each muffler will affect your sound and performance. Take a listen and decide which muffler is best for your rod.
  • Some basic info on the various exhaust options carried by Speedway Motors.

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