Description
Flowmaster’s American Thunder cat-back exhaust system for the 2009-2018 Toyota Tundra pickup trucks with the 5.7L or 4.6L V8 engines is perfect for the person looking for an aggressive sound level with all of the performance benefits that you would expect from Flowmaster. This DOR/DOS (Dual Out Rear, Dual Out Side) bolt on 409S stainless steel system features dual 2.50 in. tailpipes and 3.50 in. polished stainless steel tips. This system is designed to fit regular cab/long bed, double cab/short bed and CrewMax models. The exhaust system is covered by Flowmaster’s Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.
Resources
Installation Instructions
Specifications:
| California Proposition 65 Chemical Name 1 | Nickel (metallic) |
| California Proposition 65 Chemical Name 2 | Chromium (hexavalent compounds) |
| Description_ASC | Holley Performance Emission Code 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 |
| Description_ASM | Fits 2010-2018 Toyota Tundra with 4.6L or 5.7L V8 engine. 145in. Wheelbase Models Only. |
| Description_DEF | Exhaust System Kit |
| Description_DES | American Thunder Cat Back Exhaust System |
| Description_EXT | American Thunder Cat Back Exhaust System; Dual; Dual Rear Same Side Exit; 2.5 in. Tubing; 40 Series Big Block Mufflers; 3.5 in. Pol. Stainless Steel Tips; |
| Description_FAB | Aggressive Performance Tone |
| Description_FAB | Lifetime Limited Warranty |
| Description_FAB | Mandrel Bent Stainless Steel Tubing |
| Description_FAB | Multiple Exit Styles Provided In Kit |
| Description_INV | 09-21 TUNDRA V8 AMT DOR/S 409S |
| Description_KEY | 817664; American Thunder; Cat-back; DOR/S; Aggressive sound; Toyota Tundra; 2009-2017 |
| Description_LAB | Made In Logo |
| Description_LAB | Proposition 65 |
| Description_MKT | Flowmaster’s American Thunder cat-back exhaust system for the 2009-2018 Toyota Tundra pickup trucks with the 5.7L or 4.6L V8 engines is perfect for the person looking for an aggressive sound level with all of the performance benefits that you would expect from Flowmaster. This DOR/DOS (Dual Out Rear, Dual Out Side) bolt on 409S stainless steel system features dual 2.50 in. tailpipes and 3.50 in. polished stainless steel tips. This system is designed to fit regular cab/long bed, double cab/short bed and CrewMax models. The exhaust system is covered by Flowmaster’s Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation. |
| Description_MKT | 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. Note: 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. |
| Description_SHO | Exhaust System Kit |
| Exhaust Series | American Thunder |
| Exhaust Type | Dual |
| Exit Position | Dual Rear Same Side |
| Exit Style | Straight |
| Heat Shield Attached | No |
| height | 16.3 |
| Inlet Diameter | 2.500 in. |
| Inlet Inside Diameter | 2.500 in. |
| length | 52.5 |
| LTL | N |
| Material | Stainless Steel |
| Muffler Part Number | Kit Only |
| Muffler Series | 40 Series Big Block |
| Outlet Diameter | 2.500 in. |
| Outlet Outside Diameter | 3.500 in. |
| Single or Dual | Dual |
| Sound Level | Aggressive |
| System Type | Cat Back |
| Tail Pipe Diameter | 2.500 in. |
| Tip Diameter | 3.500 in. |
| Tip Length | 13.000 in. |
| Tip Quantity | 2 |
| Title | Flowmaster 817664 Cat-back System 409S – Dual Rear/Side Exit – American Thunder – Aggressive Sound |
| Tubing Diameter | 2.500 in. |
| WARNING CA Proposition 65 | Yes |
| WARNING CA Proposition 65 Message | WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
| weight | 63.3 |
| width | 15.0 |
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