Swapping a Gen 1 5.0L Coyote into your Fox Body Mustang and want longtube headers designed specifically for the application? Speed Engineering's Coyote swap longtube headers are engineered for the Fox Body chassis — mandrel bent, TIG-welded, and CNC-machined from 304 natural stainless steel with merge spikes for maximum exhaust flow. Dyno proven to deliver over 25 rear-wheel horsepower over stock manifolds.
⚠️ Important Installation Notes:
- Requires a UPR K-Member and motor mounts — these headers are designed around the UPR K-member setup and will not work without it
- Gen 1 5.0L Coyote (2011–2014) only — these headers do NOT work with 2015+ Coyote engines equipped with Charge Motion Control Valves
- Coyote swap applications only — NOT compatible with original Ford engines of any kind
- Requires removal of the original crossmember mounts — Stifflers crossmember is recommended
- Requires OEM starter part number SA848RM
- Custom shifter linkage may be required with certain transmission configurations
- Compatible transmissions: 6R80, 10R80, and MT-82
- Header Bolt Thread Pitch:
- Early Gen 1 (2011) and some Gen 3 (2018+): M10x1.25
- Late Gen 1 (2011) and Gen 2 (2015–2017): M10x1.5
- Verify your thread pitch before ordering bolts
Features:
- Full 1-7/8" Port-Matched Primary Tubes with Merge Spikes — Maximum flow from cylinder head to collector for aggressive Coyote swap performance
- 3" Collector with Merge Spikes — Optimized merge geometry for strong low-to-mid RPM torque
- Mandrel Bent Tubing — Consistent tube diameter through every bend; no crimping, no restriction
- CNC Machined Flanges — Precision fit at the cylinder head for a leak-free seal
- 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
- Longtube Header Design — Maximum scavenging efficiency vs. shorty or mid-length headers
- Standard Graphite Manifold Gaskets Included
- Dyno Proven — 25+ RWHP gain on Coyote swap applications
- Compatible with Gen 1 5.0L Coyote V8 Engines (2011–2014)
- V8 Engines Only
Vehicle Applications:
Note: All applications listed are Gen 1 5.0L Coyote swap conversions. These headers are NOT compatible with original Ford engines or 2015+ Coyote engines with Charge Motion Control Valves.
Ford Mustang — Fox Body (RWD) — Coyote Swap
- 1979 Ford Mustang (RWD) — Coyote Swap
- 1980 Ford Mustang (RWD) — Coyote Swap
- 1981 Ford Mustang (RWD) — Coyote Swap
- 1982 Ford Mustang (RWD) — Coyote Swap
- 1983 Ford Mustang (RWD) — Coyote Swap
- 1984 Ford Mustang (RWD) — Coyote Swap
- 1985 Ford Mustang (RWD) — Coyote Swap
- 1986 Ford Mustang (RWD) — Coyote Swap
- 1987 Ford Mustang (RWD) — Coyote Swap
- 1988 Ford Mustang (RWD) — Coyote Swap
- 1989 Ford Mustang (RWD) — Coyote Swap
- 1990 Ford Mustang (RWD) — Coyote Swap
- 1991 Ford Mustang (RWD) — Coyote Swap
- 1992 Ford Mustang (RWD) — Coyote Swap
- 1993 Ford Mustang (RWD) — Coyote Swap
Frequently Asked Questions:
Q: Do these headers require a specific K-member? Yes. These headers are designed for use with a UPR K-member and UPR motor mounts. They will not work without this setup.
Q: Will these work with a 2015 or newer Coyote engine? No. These headers are not compatible with 2015+ Coyote engines that are equipped with Charge Motion Control Valves. Gen 1 Coyote (2011–2014) only.
Q: What crossmember do I need? The original crossmember mounts must be removed. Stifflers crossmember is the recommended replacement.
Q: What starter do I need? This swap requires OEM starter part number SA848RM.
Q: What transmissions are compatible? These headers are compatible with the 6R80, 10R80, and MT-82 transmissions. Custom shifter linkage may be required with certain transmission configurations.
Q: What header bolt thread pitch do I need? Early Gen 1 (2011) and some Gen 3 (2018+) Coyote engines use M10x1.25 bolts. Late Gen 1 (2011) and Gen 2 (2015–2017) engines use M10x1.5 bolts. Verify your thread pitch before sourcing header bolts.
Q: Will these headers work with the original Fox Body engine? No. These headers are designed for 5.0L Coyote engine swaps only and are not compatible with original Ford engines of any kind.
Q: How much horsepower do these headers add? Speed Engineering's 1-7/8" Coyote swap longtube headers are dyno proven to add over 25 rear-wheel horsepower compared to stock exhaust manifolds on Coyote swap applications.
Q: What material are these headers made from? 304 natural stainless steel with full TIG-welded construction, CNC-machined flanges, and merge spikes.
Q: Are gaskets included? Yes. Standard graphite manifold gaskets are included.
Q: Are these headers street legal? No. These are race-only headers intended for closed-course competition use only. Installation on a street-driven vehicle may violate the Clean Air Act (42 U.S.C. 7522(a)(3)).
⚠️ Race Use Only: This product is manufactured and sold for installation on vehicles used solely for competition. Once installed, the vehicle may not be used, registered, or licensed for use on a public road or highway. Installation on a street-driven vehicle may violate the Clean Air Act 203(a)(3), 42 U.S.C. 7522(a)(3).