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Flowmaster 817664 American Thunder Cat-Back Exhaust System

(2009-2021 Toyota Tundra)

Part of: Flowmaster American Thunder Cat-Back Exhaust System

Other options in this family: Flowmaster 17395 Flowmaster 817568 Flowmaster 17213 Flowmaster 818196 Flowmaster 818176

Manufacturer

Picture for manufacturer Flowmaster

Part Number

817664
14 reviews
Sale Price

$1,299.95

2 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Flowmaster 817664 American Thunder Cat-Back Exhaust System delivers aggressive performance sound and improved exhaust flow with straightforward bolt-on installation. This complete cat-back system is engineered to use factory hanger locations and clears the factory spare tire for hassle-free fitment.

Key Features:

  • Super 40 Series performance muffler produces a deep, aggressive exhaust tone
  • Mandrel-bent stainless steel tubing maximizes exhaust flow and reduces backpressure
  • Large 3.50-inch polished 304 stainless steel tips for a premium appearance
  • Multiple exit style options included in the kit for customized installation
  • Utilizes factory hanger locations for proper fitment and easy installation
  • Includes all necessary mounting hardware and clamps
  • Clears factory spare tire positioning without modifications
  • Backed by Flowmaster's lifetime limited warranty

This American Thunder system combines Flowmaster's renowned Super 40 muffler technology with precision-engineered mandrel bends to deliver both performance gains and the signature aggressive sound that enthusiasts demand. The stainless steel construction ensures long-lasting durability and corrosion resistance.

Products specifications

Fits

2009-2021 Toyota Tundra

Inlet Inside Diameter

2.500 in.

Tip Diameter

3.500 in.

Outlet Outside Diameter

3.500 in.

System Type

Cat Back

Prop 65

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

California Proposition 65 Chemical Name 2

Chromium (hexavalent compounds)

California Proposition 65 Chemical Name 1

Nickel (metallic)

California Proposition 65 Chemical Name

Chromium (hexavalent compounds)

California Proposition 65 Chemical Name

Nickel (Metallic)

Exit Position

Dual Rear Same Side

Heat Shield Attached

No

Material

Stainless Steel

Tubing Diameter

2.500 in.

Outlet Diameter

2.500 in.

Tip Quantity

2

Tail Pipe Diameter

2.500 in.

Exhaust Type

Dual

Single or Dual

Dual

Tip Length

13.000 in.

Title

Flowmaster 817664 Cat-back System 409S - Dual Rear/Side Exit - American Thunder - Aggressive Sound

Brand

Flowmaster

Catalytic Converter Quantity

0

Category

Exhaust

Clamping Type

Flat Band

Clamps Included

Yes

Drive

2WD

Drive

4WD

Emission Code

5

Exhaust Series

American Thunder

Exhaust Tip Color

Silver

Exhaust Tip Connection

Clamp-On

Exhaust Tip Cut

Angled

Exhaust Tip Edge

Angle Cut

Exhaust Tip Finish

Polished

Exhaust Tip Intercooled

No

Exhaust Tip Material

304 Stainless Steel

Exhaust Tip Quantity

2

Exhaust Tip Resonated

No

Exhaust Tip Shape

Round

Exhaust Tip Wall

Double Wall

Exit Style

Dual Out Side

Exit Style

Dual Out Rear

Finish

Natural

Gasket Or Seal Included

No

Grade Type

Performance

Hangers Included

Yes

Heat Shield Included

No

Inlet Diameter

2.50

Inlet Type

Flanged

Mounting Bracket Included

Yes

Muffler Body Length

13.25

Muffler Body Material

409 Stainless Steel

Muffler Body Shape

Oval

Muffler Finish

Black High-Temperature Paint Finish

Muffler Flanged Inlet

No

Muffler Flanged Outlet

No

Muffler Inlet Connection

Slip-Fit

Muffler Outlet Connection

Slip-Fit

Muffler Outlet Quantity

2

muffler part number

Kit Only

Muffler Quantity

1

Muffler Series

Super 40 Series

Muffler Type

Chambered

Pipe Color

Silver

Pipe Material

409 Stainless Steel

Product Type

Exhaust System

Sound Level

Aggressive

Spring Bolt Kit Included

No

Sub Category

Exhaust and Tail Pipes

Tail Pipe Quantity

2

Tail Pipe Quantity

Dual

Tail Pipe Tapered Outlet

No

Type

Cat-Back

Valve Included

No

Valve Type

Not Applicable

Warning

California Proposition 65

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