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817409 - Flowmaster American Thunder Header-back Exhaust System - default Image
817409 - Flowmaster American Thunder Header-back Exhaust System - additional Image
817409 - Flowmaster American Thunder Header-back Exhaust System - additional Image
1968-72 GM A-Body Cars - American Thunder Exhaust System 817409YouTube Button

Flowmaster American Thunder Header-back Exhaust System

Fits 1968-1972 GM A-Body with V8 engine. 2.50" Stainless Steel Pipes.

PART# 817409

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Fits 1968-1972 GM A-Body with V-8 engine.

Overview

For the person who is looking for a complete Header-back dual exhaust system with an aggressive tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. 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.

Features:

  • H-pipe Crossover for Maximum Power and Deep Tone
  • Super 40 Series Mufflers for Deep Powerful Sound
  • Mandrel-bent 16-gauge Stainless 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
  • Lifetime Limited Warranty

Specs

2WD/4WD2WD
BrandFlowmaster
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Emission Code3
Exhaust SeriesAmerican Thunder
Exit PositionDual Rear Exit
Heat ShieldNo
Inlet Diameter (in)2.5
MaterialStainless Steel
Muffler Part NumberKit Only
Muffler Quantity2
Muffler SeriesSuper 40 Series
Outlet Diameter (in)2.5
Product TypeExhaust Systems / Kits
Single DualDual
Sound LevelAggressive Sound
System TypeHeader-back System
Tip QuantityNot Included
Tubing Diameter (in)2.5
Type of ExhaustHeader-Back
Part Number817409

Emissions

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 1968-1972 GM A-Body with V-8 engine.

Applications

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