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Vehicle Info NeededFLOWMASTERPART NUMBER: 389-817585
American Thunder Header-Back Exhaust System 1967-1974 Mopar A Body V8
$1,29995
Ships on 09/09/2026
Lowest Price GuaranteeMopar A-Body
- American Thunder Header-Back Exhaust System
- 1967-1974 Mopar A Body V8
- 2.5" Tubing
- Tips Not Included
- Dual Rear Exit
- Super 40 Series Muffler
- 409S Stainless Steel
Experience An Exhaust System Tuned for Performance and Tone
If you need an exhaust system that has been dyno tuned to produce maximum performance, look no further than Flowmaster's American Thunder Exhaust Systems. This line, designed for passenger cars, produces a range of systems that offer moderate to aggressive exhaust notes. Available in axle, cat, and header-back configurations, Flowmaster has you covered. To ensure durability and ease of installation, these kits are made from 16-gauge mandrel bent tubing and includes the necessary hangers and hardware.
Part TypeExhaust System
Product LineFlowmaster American Thunder Exhaust Systems for Cars
BrandFLOWMASTER
Package Height14.0
Package Width18.0
Package Length71.0
Weight55.0 PG
Muffler Body Diameter10 in.
Tailpipe Diameter (In.)2.5
Muffler Inlet Inside Diameter2.50 in.
Hangers IncludedYes
Main Piping Diameter2.50 in.
Tail Pipe QuantityDual
Inlet TypeWeld-On
Catalytic Converter Quantity0
Exit LocationRear
Inlet QuantityTwo
Muffler Body Length13.50 in.
Sound LevelAggressive / Moderate
Muffler MaterialStainless steel
Muffler Body Material409 Stainless Steel
Gasket Or Seal IncludedNo
Pipe ColorSilver
System FinishNatural
Muffler Quantity2
Muffler Inlet Outside Diameter2.63 in.
Exit QuantityTwo
Muffler Flanged OutletNo
Tip QuantityNone
Exhaust TypeDual
Catalytic Converter IncludedNo
Heat Shield IncludedNo
Part CategoryPerformance Parts
Hardware IncludedYes
Exhaust Tip Quantity0
Valve IncludedNo
Muffler TypeChambered
Pipe Material409 Stainless Steel
Muffler Body Width10 in.
Tail Pipe Tapered OutletNo
Muffler Body ShapeOval
Mounting Bracket IncludedYes
Muffler Outlet Quantity1
Muffler FinishBlack High-Temperature Paint Finish
Inlet Diameter2.50 in.
Clamps IncludedYes
Muffler StyleChambered
FinishNatural
Exit StyleDual Out Rear
Muffler Body Height5 in.
Tip IncludedNo
Clamping TypeFlat Band
Muffler Flanged InletNo
Spring Bolt Kit IncludedNo
Muffler SeriesSuper 40 Series
QuantitySold as a kit
Muffler IncludedYes
Exhaust Tip ConnectionClamp-On
System StyleHeader-back
Tail Pipe Outlet Outside Diameter2.50 in.
Muffler ConfigurationSingle inlet/Single outlet
System MaterialStainless steel
Valve TypeNot Applicable
Intermediate Pipe Diameter2.5 in (63.5 mm)
Part FitmentDirect Fit
Vendor Part Number817585
Package Qty1
Package TypeEA
No Questions
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Some parts are not legal for use in California or other states with similar laws / regulations
