1968-1972 Chevrolet Chevelle Header-back Exhaust System Flowmaster American Thun

1968-1972 Chevrolet Chevelle Header-back Exhaust System Flowmaster American Thun

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This headers-back American Thunder system is custom designed for high horsepower and large cubic inch engines in 1968-1972 GM A-Bodies with a V8 engine. It's a true-dual exhaust system featuring all mandrel-bent 3.00-inch stainless steel tubing with a built-in H-pipe crossover assembly flowing into a pair of large cased Super 40 Series performance mufflers for maximum power and a deep powerful aggressive exhaust note. The large 3.00-inch mandrel-bent tailpipes are custom bent to tuck up high above the rear end and exit with a slight turn down under the rear bumper. The system is constructed from 409 stainless steel for maximum durability, includes all necessary hardware and hangers for installation and is covered by our Lifetime Limited Warranty. This system is also available in Aluminized steel and comes with a 3-year Limited Warranty, check out part# 17200.


  • 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
  • Header-back True Dual Exhaust System
  • Does Not Include Header Reducers
  • Aggressive Exterior Exhaust Tone
  • Lifetime Limited Warranty


  • Fits 1968-1972 GM A-Body with a V8 engine.
Brand Flowmaster
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
California Proposition 65 Chemical Name Nickel (Metallic)
California Proposition 65 Required Yes
Emission Code 3
Exhaust Series American Thunder
Exit Position Dual Out Rear
Heat Shield No
Inlet Diameter (in) 3
Material 409 Stainless Steel
Muffler Part Number Kit Only
Muffler Quantity 2
Muffler Series Super 40 Series
Outlet Diameter (in) 3
Product Type Exhaust System
Single Dual Dual
Sound Level Aggressive
System Type Header-back
Tip Quantity Not Included
Tubing Diameter (in) 3
Type of Exhaust Header-Back
Warning California Proposition 65


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