_1.webp)
_2.webp)
_3.webp)
_4.webp)
_5.webp)
_6.webp)
_7.webp)
This Flowmaster® Outlaw Direct-Fit Muffler system for the 2021-2025 Ford F-150 trucks with the 2.7, 3.5 or 5.0-liter engines is manufactured using durable 409 stainless steel throughout and features 3.00-inch mandrel bent pipes for optimum exhaust gas flow. A Flowmaster Outlaw Series muffler is used for an aggressive sound level and maximum performance. Performance increases on the dyno revealed an increase of 16 hp and 21 ft/lbs. at the rear wheels. This system connects directly to the factory dual tail pipes and uses all the existing factory hangers. Includes installation instructions and all necessary hardware for an easy installation that you can do at home. Backed by Flowmaster’s Lifetime Limited Warranty.
Fits 2021-2025 Ford F-150 with 2.7, 3.5 and 5.0-liter non-PowerBoost engines with factory dual tailpipes
21-25 F-150 DIRECT FIT MUFFLER OTL
MUFF DF ASMB
This system replaces ONLY the Factory muffler and over axle pipes and reuses the factory dual tail pipes and tips. Does not fit PowerBoost hybrid models. Does not fit models with OEM active exhaust option.
| Brand |
Flowmaster |
|---|---|
| Part Number (MPN) |
818171 |
| SKU |
818171 |
| UPC / GTIN |
090127846599 / 00090127846599 |
| Condition |
New |
| Body Height |
4.00 |
| Body Length |
6.50 |
| Body Material |
409 Stainless Steel |
| Body Width |
9.50 |
| California Proposition 65 Chemical Name |
Chromium (hexavalent compounds) |
| Category |
Exhaust |
| Clamping Type |
Flat Band |
| Clamps Included |
Yes |
| Emission Code |
5 |
| Exhaust Series |
Outlaw |
| Exhaust Tip Quantity |
0 |
| Exit Position |
OEM |
| Finish |
High-Temperature Paint |
| Gasket Or Seal Included |
No |
| Grade Type |
Performance |
| Hangers Included |
Yes |
| Heat Shield Attached |
No |
| Inlet Inside Diameter |
2.75 |
| Inlet Location |
Center |
| Inlet Outside Diameter |
2.88 |
| Inlet Quantity |
1 |
| Inlet Type |
Slip-Fit |
| Main Piping Diameter |
3.00 |
| Material |
409 Stainless Steel |
| Mount Type |
Uses factory hangers |
| Muffler Body Length |
6.50 |
| Muffler Color |
Black |
| Muffler Finish |
Black High-Temperature Paint Finish |
| Muffler Inlet Diameter |
3.00 |
| Muffler Inlet Location |
Center |
| Muffler Material |
409 Stainless Steel |
| Muffler Outlet Diameter |
3.00 |
| Muffler Outlet Location |
Dual |
| Muffler Overall Length |
12.20 |
| Muffler Part Number |
Kit Only |
| Muffler Quantity |
1 |
| Muffler Series |
10 Series |
| Muffler Shape |
Oval |
| Muffler Type |
Chambered |
| Outlet Inside Diameter |
3.00 |
| Outlet Location |
Dual |
| Outlet Outside Diameter |
3.13 |
| Outlet Quantity |
2 |
| Outlet Type |
Slip-Fit |
| Overall Length |
55.20 |
| part type |
Exhaust Muffler Assembly |
| Pipe Material |
409 Stainless Steel |
| Product Type |
Exhaust System |
| Single Dual |
Dual |
| Sound Level |
Aggressive |
| Spring Bolt Kit Included |
No |
| Sub Category |
Mufflers |
| System Type |
Direct-fit Muffler |
| Tip Style |
Not Included |
| Tubing Diameter |
3.00 |
| Tubing Material |
409 Stainless Steel |
| Warning |
California Proposition 65 |
| Year |
2025 |
| Make |
Ford |
| Model |
F-150 |
| Body & Trim |
King Ranch |
| Engine & Transmission |
3.5L V6 – Gas |
Vehicle Fitment
_1.webp)
_3_Outlet_(ID)_-_Walker_Exhaust_(18972)_2.webp)
_1.webp)
_1.75_Outlet_(OD)_-_Walker_Exhaust_(18582)_3.webp)
