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Flowmaster

Flowmaster American Thunder Crossmember-Back Exhaust System

Fits 1967-1974 Mopar A-Body cars with V8 engine. - Aggressive to moderate sound

Part # 817585 Be the first to write a review

Flowmaster American Thunder Crossmember-Back Exhaust System

Estimated Ship Date: 05/23/2025
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$1,103.95
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5

Emissions

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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For the person who is looking for a complete Crossmember-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.

Features:

  • Premium Quality
  • Improved Horsepower, Torque and Engine Efficiency
  • Delta Flow Technology
  • Super 40 Sound Level
2WD/4WD2WD
Automotive Item GradeHigh Performance
Brand Flowmaster
Catalytic Converter Quantity0
CategoryExhaust
Clamping TypeFlat Band
Round Band
Clamps IncludedYes
Emission Code5
Exhaust SeriesAmerican Thunder
Exhaust Tip ConnectionClamp-On
Exhaust Tip Quantity2
Sold Separately
Exit PositionDual Out Rear
Exit StyleDual Out Rear
FinishNatural
Gasket Or Seal IncludedNo
Grade TypePerformance
Hangers IncludedYes
Heat ShieldNo
Inlet Diameter2.50 IN
Inlet TypeWeld-On
Main Piping Diameter2.50 IN
Material409 Stainless Steel
Mounting Bracket IncludedYes
Muffler (Left) Body Height5.00 IN
Muffler (Left) Body Length13.50 IN
Muffler (Left) Body Width10.00 IN
Muffler (Left) TypeChambered
Muffler (Right) Body Height5.00 IN
Muffler (Right) Body Length13.50 IN
Muffler (Right) Body Width10.00 IN
Muffler (Right) TypeChambered
Muffler Body Diameter10.00 IN
Muffler Body Length13.50 IN
Muffler Body Material409 Stainless Steel
Muffler Body ShapeOval
Muffler FinishBlack High-Temperature Paint Finish
Muffler Flanged InletNo
Muffler Flanged OutletNo
Muffler Inlet ConnectionSlip-Fit
Muffler Inlet Inside Diameter2.50 IN
Muffler Inlet Outside Diameter2.63 IN
Muffler Outlet ConnectionSlip-Fit
Muffler Outlet Quantity1
Muffler Part NumberKit Only
Muffler Quantity2
Muffler SeriesSuper 40 Series
Muffler TypeChambered
Outlet Diameter2.50 IN
part typeExhaust System Kit
Pipe Material409 Stainless Steel
Product TypeExhaust System
Single DualDual
Sound LevelAggressive / Moderate
Spring Bolt Kit IncludedNo
Sub CategoryExhaust and Tail Pipes
System TypeCrossmember-back
Tail Pipe Outlet Outside Diameter2.50 IN
Tail Pipe Quantity2
Tail Pipe Tapered OutletNo
Tip QuantityNot Included
Tubing Diameter2.50 IN
TypeCrossmember-back
Valve IncludedNo
Valve TypeNot Included
UPC700042027484
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817585
5

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.
Instructions - fm_warranty_general.pdf
Instructions - 817585.pdf
Fits 1967-1974 Mopar A-Body, such as Dodge Dart, Demon, Plymouth Barracuda, Duster, Valiant with V8 engine. Including convertibles.

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