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Manufacturer of performance exhaust systems, mufflers, performance air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.
| Download Name | File Size |
| fm_warranty_general.pdf | 88.58KB |
| 817808_instructions.pdf | 3.76MB |
| Make | Model | Submodel | Years | Engine | Fitment Notes |
| Ford | Mustang | Bullitt | 2020 | 5.0L / 302 / V8 | |
| Ford | Mustang | GT Premium | 2018 | 5.0L / 302 / V8 | Does not fit with Active Performance Exhaust |
| Ford | Mustang | GT Premium | 2019 | 5.0L / 302 / V8 | Does not fit vehicles with Active Performance Exhaust Option |
| Ford | Mustang | GT Premium | 2020 | 5.0L / 302 / V8 | |
| Ford | Mustang | GT Premium | 2021 | 5.0L / 302 / V8 | |
| Ford | Mustang | GT Premium | 2022 | 5.0L / 302 / V8 | |
| Ford | Mustang | GT Premium | 2023 | 5.0L / 302 / V8 | |
| Ford | Mustang | GT V8 | 2019 | 5.0L / 302 / V8 | Does not fit vehicles with Active Performance Exhaust Option |
| Ford | Mustang | GT V8 | 2020 | 5.0L / 302 / V8 | |
| Ford | Mustang | GT | 2018 | 5.0L / 302 / V8 | Does not fit with Active Performance Exhaust |
| Ford | Mustang | GT | 2019 | 5.0L / 302 / V8 | Does not fit vehicles with Active Performance Exhaust Option |
| Ford | Mustang | GT | 2020 | 5.0L / 302 / V8 | |
| Ford | Mustang | GT | 2021 | 5.0L / 302 / V8 | |
| Ford | Mustang | GT | 2022 | 5.0L / 302 / V8 | |
| Ford | Mustang | GT | 2023 | 5.0L / 302 / V8 | |
| Ford | Mustang | Mach 1 | 2022 | 5.0L / 302 / V8 | |
| Ford | Mustang | Mach 1 | 2023 | 5.0L / 302 / V8 |
| California Proposition 65 Chemical Name | Chromium (hexavalent compounds), Nickel (Metallic) |
| California Proposition 65 Required | Yes |
| Catalytic Converter Included | No |
| Emission Code | 5 |
| Exhaust Series | Outlaw |
| Exit Position | Dual Out Rear |
| Heat Shield | No |
| Material | 409 Stainless Steel |
| Mount Type | Uses Factory Hangers |
| Muffler Body Length (in) | 6.5 |
| Muffler Color | Black |
| Muffler Finish | Painted |
| Muffler Inlet Diameter (in) | 3 |
| Muffler Inlet Location | Centered |
| Muffler Material | 409S Stainless Steel |
| Muffler Outlet Diameter (in) | 3 |
| Muffler Outlet Location | Centered |
| Muffler Overall Length (in) | 49.5 |
| Muffler Part Number | Kit Only |
| Muffler Quantity | 2 |
| Muffler Series | Outlaw |
| Muffler Shape | Round |
| Muffler Type | Reflection |
| Part Type | Exhaust System Kit |
| Product Type | Exhaust System |
| Proposition 65 | www.P65Warnings.ca.gov |
| Single Dual | Dual |
| Sound Level | Aggressive |
| System Type | Cat-back |
| Tip Cut | Angle |
| Tip Diameter (in) | 4 |
| Tip Edge Style | Rolled |
| Tip Finish | Natural |
| Tip Length (in) | 5.25 |
| Tip Logo | Printed |
| Tip Material | 304 Stainless/Carbon Fiber |
| Tip Quantity | 4 |
| Tip Shape | Round |
| Tubing Diameter (in) | 3 |
| Tubing Material | 409S Stainless Steel |
| Warranty | Limited Lifetime (Lifetime) |
