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Flowmaster American Thunder Cat-back Exhaust System

2005-2012 Toyota Tacoma with 4.0L engine. (See applications below)

Part # 817432 Be the first to write a review
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Delta Flow
This American Thunder® Cat-back system is designed for the 2005-2012 Toyota Tacoma with 4.0L engine. The system is constructed entirely of 409S stainless steel for long-lasting durability. The 2.50-inch mandrel bent system connects to the back of the factory catalytic converter assembly using the supplied flanged inlet pipe. It then flows into a Super 50™ Series performance muffler and exits into dual 2.50-inch stainless steel tailpipes, which exit on both sides of the vehicle behind the rear tires. The tailpipes are finished off with large 3.00-inch polished stainless tips embossed with the Flowmaster® logo. As an American Thunder system, it provides improved horsepower and torque along with a moderate performance sound level both inside and outside of the vehicle. Includes instructions and all necessary hardware for an easy bolt-on installation you can do at home and is covered by our Lifetime Limited Warranty. Note: Does NOT fit standard cab or X-Runner models.


  • Includes all Necessary Parts and Detailed Instructions
  • Attaches Directly to Factory Catalytic Convertor
  • Dual 3.00-inch Polished Stainless Steel Tips
  • Dyno Tuned For Maximum Performance
  • Super 50 Series Performance Muffler
  • Uses the Factory Hanger Locations
  • Clears the Factory Spare Tire
  • Stainless Steel Construction
  • Lifetime Limited Warranty
  • Delta Flow Technology
  • Easy Installation

About Flowmaster

Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound.

Brand Flowmaster
Emission Code5
Exhaust SeriesAmerican Thunder
Exit PositionDual Side Exit
Heat ShieldNo
Inlet Diameter (in)2.5
Material409 Stainless Steel
Muffler Part NumberKit Only
Muffler Quantity1
Muffler SeriesSuper 50 Series
Outlet Diameter (in)2.5
Product TypeExhaust System
Single DualDual
Sound LevelAggressive / Moderate
System TypeCat-back
Tip Diameter (in)3
Tip Quantity2
Tubing Diameter (in)2.5
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817432

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.

Fits 2005-2012 Toyota Tacoma with 4.0L engine, fits 2/4 wheel drive models. Does not fit standard cab or X-Runner models.

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