Flowmaster 817584 Header-Back System 409S for 63-66 Mopar A-Body

Price:   $712.56

Flowmaster 817584 Header-back System 409S - Dual Rear Exit - American Thunder® -Moderate/Aggressive

For the person who is looking for a complete Header-back dual exhaust system with a performance sound. This system is mandrel bent for maximum performance and includes specially selected mufflers. American Thunder 2.5 In. systems generally deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The sound level will depend greatly on the engine and level of modification. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.

Note 1: For best fit, modification of transmission crossmember is recommended. Template and instructions included.
Note 2: May require removal of the passenger-side emergency brake cable guide bracket.
Note 3: Does not fit wagon.

Product Specification:

  • 2WD/4WD: 2WD
  • Automotive Item Grade: High Performance Part
  • Exhaust series: American Thunder®
  • Exit Position: Dual Rear Exit
  • Heat shield: None
  • Inlet diameter (inches): 2.50
  • Material: Stainless Steel
  • Muffler part number: Kit Only
  • Muffler quantity: 2
  • Muffler series: Super 40 Series
  • Outlet diameter (inches): 2.50
  • Single/Dual: Dual
  • Sound level: Moderate/Aggressive Sound
  • System type: Header-back System
  • Tip quantity: None
  • Tubing diameter (inches): 2.50


  • 1964-1965 Dodge Dart 270 V8, 6.3L
  • 1964-1966 Dodge Dart 270 V8, 4.5L
  • 1965 Dodge Dart 270 V8, 6.8L
  • 1963-1966 Dodge Dart Base V8, 6.3L
  • 1964-1966 Dodge Dart Base V8, 4.5L
  • 1963-1965 Dodge Dart Base V8, 6.7L
  • 1963-1966 Dodge Dart Base V8, 5.2L
  • 1965-1966 Dodge Dart GT V8, 6.3L
  • 1965-1966 Dodge Dart GT V8, 4.5L
  • 1965 Dodge Dart GT V8, 6.8L
  • 1964 Dodge Dart GTS V8, 4.5L
  • 1964 Dodge Dart GTS V8, 6.3L
  • 1964 Plymouth Barracuda Base V8, 5.9L
  • 1964-1966 Plymouth Barracuda Base V8, 4.5L
  • 1966 Plymouth Barracuda Base V8, 5.2L
  • 1964 Plymouth Valiant 200 V8, 4.5L
  • 1964-1966 Plymouth Valiant Base V8, 4.5L
  • 1965-1966 Plymouth Valiant Signet V8, 4.5L

Note: 1963 to 1966 Mopar A-body, includes Dodge Dart and Plymouth Valiant and Barracuda with a V8 engine. Does fit convertible models. Does not fit wagon models. May require removal of he passenger-side emergency brake cable guide bracket. For best fit, modific.

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  • Model: 817584
  • Shipping Weight: 82.5lbs
  • 3 Units in Stock
  • Manufactured by: Flowmaster

This product was added to our catalog on Thursday 28 May, 2015.