Skip to product information
1 of 10

Flowmaster

Flowmaster American Thunder Cat-back Exhaust System

Flowmaster American Thunder Cat-back Exhaust System


Regular price $1,299.95
Sale price $1,299.95 Regular price
Shipping calculated at checkout.

✔ 30-day returns on unused items in original packaging. Details
✔ Manufacturer warranty: we help with claims
✔ Fitment question? Email [email protected]


Shipping: Ships from the manufacturer or distributor. Processing times vary by manufacturer; we'll email tracking as soon as your order ships.

Free shipping on orders $100+ to the contiguous U.S. (flat $12.99 under $100)

The American Thunder® cat-back exhaust system for 2009-2021 Toyota Tundra trucks with the 4.6L, 4.7L or 5.7L engine is perfect for the person looking for an deep aggressive exterior tone with a mellow growl inside the truck and all of the performance benefits you expect from Flowmaster®. This bolt-on emissions-legal system features all stainless steel construction, a specially designed dual inlet Super 40® Series muffler flowing into dual 2.50-inch mandrel-bent tailpipes for maximum performance with a deep tone.

The kit comes with two sets of final pipes for either a dual out the back look or dual out behind the rear tires, which is beneficial for towing. The tailpipes are finished off with a pair of 3.50-inch double wall polished stainless steel tips. The system includes all necessary parts and hardware for easy at home installation.

Key Features

  • CARB (California) Compliant: Yes
  • Exhaust Series: American Thunder
  • Heat Shield Included: No
  • Inlet Diameter: 2.50
  • Muffler Included: Yes
  • Muffler Part Number: Kit Only

Specifications

Part Number 817664
Brand Flowmaster
CARB (California) Compliant Yes
Exhaust Series American Thunder
Heat Shield Included No
Inlet Diameter 2.50
Muffler Included Yes
Muffler Part Number Kit Only
Muffler Series Super 40 Series
Sound Level Aggressive
Tail Pipe Quantity Dual
Pipe Color Silver
Drive 4WD
Drive 2WD

Fitment

  • Fits 2009-2021 Toyota Tundra 4.6L, 4.7L or 5.7L engine with 145-inch Wheelbase only. Note: Does not fit regular cab/short bed or double cab/long bed models. Only fits 2009 models built after 08/2008
  • Fits 2/4 wheel drive.
  • Does not fit regular cab/short bed or double cab/long bed models.
  • Only fits 2009 models built after 08/2008.

Double-check your vehicle details before ordering. Questions? Email [email protected].

FAQs

What vehicles does it fit?
It fits 2009-2021 Toyota Tundra 4.6L, 4.7L or 5.7L engine with 145-inch Wheelbase only. Note: Does not fit regular cab/short bed or double cab/long bed models. Only fits 2009 models built after 08/2008; Fits 2/4 wheel drive.; Does not fit regular cab/short bed or double cab/long bed models.; Only fits 2009 models built after 08/2008.. Double-check your vehicle details before ordering. Questions? Email [email protected].

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Why Choose Venture Overland Company: Free shipping on orders over $100, most orders ship in 1-2 business days, and every order is covered by our 30-day return policy.


Flowmaster American Thunder Cat-back Exhaust System

$1,299.95

Gear Up for Adventure

Find Your Way

At Venture Overland Company, our motto is simple: Find Your Way. Whether you're hitting the backroads for a weekend escape or building the ultimate overland rig for months on the trail, we're here to help you get there. Every part we carry is chosen to give you the reliability, performance, and confidence to go farther and explore more. Load up, point the wheels off the pavement, and find your way—your adventure starts here.

Empowering Your Journey

Your Trusted Off-Road Partner

At Venture Overland Company, we provide a carefully curated selection of top-tier brands and expert guidance to help you enhance your vehicle’s performance. Our community-driven approach ensures every product integrates seamlessly into your adventures, whether upgrading your Jeep, Toyota, or Ford. With our focus on quality, versatility, and outstanding service, we’re more than a store—we’re your partner in every off-road experience.

Questions?

Quick answers about returns, shipping, warranty and support for orders from Venture Overland Company.

Can I return a product if I'm not satisfied?

Yes. Most new, unused items in their original packaging can be returned within 30 days of delivery. Email us first for return authorization. See our Returns policy.

How can I contact customer service?

We provide support by email only: [email protected]. Include your order number or your vehicle year, make and model.

How long does it take to process and ship my order?

Most products ship directly from the manufacturer or distributor, and processing times vary by manufacturer. We'll email your tracking number as soon as your order ships. See our Shipping policy.

Are your products covered by a warranty?

Products are covered by their manufacturer's warranty. Email us with your order number and photos of the issue and we'll help you with the claim.

Can I cancel or modify my order after it’s been placed?

Email us as soon as possible. We can change or cancel an order only before it has been sent to the warehouse.

Exclusive discounts, just for you. Sign up now.