Skip to main content
ASK OUR EXPERTS
1-866-464-6553

Header-back System 409S - Dual Rear Exit - American Thunder - Aggressive Sound

American Thunder Kit

Part # 817457 Be the first to write a review

Header-back System 409S - Dual Rear Exit - American Thunder - Aggressive Sound

Not Available

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. This America Thunder system delivers an aggressive interior and exterior tone and is 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. Note, requires the use of a double hump cross member.

Features:

  • Header-back System
  • Includes hangers and hardware for easy installation
  • Aggressive Sound Exterior Exhaust Tone
  • Mandrel bent 16 gauge stainless steel tubing

About Flowmaster

Shop the official site of Flowmaster for exhaust systems, mufflers, and more that deliver the iconic Flowmaster sound. Available at Holley.com!

2WD/4WD2WD
Brand Flowmaster
Exhaust SeriesAmerican Thunder
Exit PositionDual Rear Exit
Heat ShieldNo
Inlet Diameter (in)2.5
MaterialStainless Steel
Muffler Part Number842548
Muffler Quantity2
Muffler SeriesSuper 44 Series
Outlet Diameter (in)2.5
Product TypeExhaust Systems / Kits
Single DualDual
Sound LevelAggressive Sound
System TypeHeader-back
Tip Diameter (in)3
Tip Quantity2
Tubing Diameter (in)2.5
Part Number817457
Fits 1978 to 1988 GM A-Body and G-Body with a V8 engine.
Reviews

    Your Review

    *Free Shipping & Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

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