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Flowmaster American Thunder Header-back Exhaust System

1966-1967 Ford Fairlane with V8 engine. 2.50 inch Aluminized Steel

PART# 17289

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Estimated shipping date: 04/16/2021
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Delta Flow
Moderate sound


The American Thunder headers back exhaust system for the 1966-1967 Ford Fairlane is constructed from 2.50-inch mandrel-bent 16 gauge aluminized steel tubing to maximize the exhaust flow and comes complete with an H-pipe crossover to equalize the exhaust pressures and eliminates backrap on deceleration. The large case Super 50 Series performance mufflers provide a deep powerful sound and maximum performance flowing into the mandrel-bent tailpipes. The Super 50 mufflers also incorporate built-in resonators keeping the interior resonance down to a minimum. The system is finished off with large 3.00-inch angle polished stainless steel tips and includes all necessary parts, hardware and instructions to complete the installation. All aluminized steel exhaust systems are covered by our 3-year Limited Warranty.


  • H-pipe Crossover for Maximum Power and Deep Tone
  • Super 50 Series Mufflers for Deep Powerful Sound
  • Mandrel-bent 16-gauge Aluminized Steel Tubing
  • Includes Hangers and Hardware for Installation
  • Moderate to Aggressive Exterior Exhaust Tone
  • Header-back True Dual Exhaust System
  • Does Not Include Header Reducers
  • Minimal Interior Resonance


Emission Code3
Exhaust SeriesAmerican Thunder
Exit PositionDual Out Rear
Heat ShieldNo
Inlet Diameter (in)2.5
MaterialAluminized Steel
Muffler Part Number52556
Muffler Quantity2
Muffler SeriesSuper 50 Series
Outlet Diameter (in)2.5
Product TypeExhaust System
Single DualDual
Sound LevelModerate
System TypeHeader-back
Tip Diameter (in)3
Tip Quantity2
Tubing Diameter (in)2.5
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number17289



This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

Tech Resources

Fits 1966-1967 Ford Fairlane with V8 engine, does not fit convertibles.


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

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