Upgrading the exhaust on your Fox Body Mustang? Speed Engineering's 1-5/8" SBF shorty headers are a direct-fit upgrade for 1979–1993 Ford Mustang 5.0L applications — mandrel bent, TIG-welded, and CNC-machined with rectangular ports, merge spikes, and a 2.5" collector. Built from 304 natural stainless steel with zinc header bolts and standard graphite manifold gaskets included.
Features:
- Full 1-5/8" Primary Tubes with Merge Spikes — Sized for improved flow on 5.0L/302 applications
- 1-1/2" x 1-1/4" Rectangular Ports — Matches standard SBF rectangular port cylinder head configurations
- 2.5" Collector with Merge Spikes — Optimized for strong low-to-mid RPM torque
- Shorty Header Design — Improved flow over stock manifolds with a compact, fitment-friendly profile
- Mandrel Bent Tubing — Consistent tube diameter throughout; no crimping, no restriction
- CNC Machined Flanges — Precision fit at the cylinder head for a leak-free seal
- 15-1/8" Center to Center Outer Bolt Holes — Standard SBF bolt spacing for direct fitment verification
- 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
- Standard Graphite Manifold Gaskets Included
- 3/8"-16x1" Zinc Header Bolts Included
- Compatible with SBF 5.0L/302 V8 Engines
- V8 Engines Only
Vehicle Applications:
Ford Mustang — Fox Body (RWD)
- 1979 Ford Mustang (RWD) — 5.0L/302 SBF
- 1980 Ford Mustang (RWD) — 5.0L/302 SBF
- 1981 Ford Mustang (RWD) — 5.0L/302 SBF
- 1982 Ford Mustang (RWD) — 5.0L/302 SBF
- 1983 Ford Mustang (RWD) — 5.0L/302 SBF
- 1984 Ford Mustang (RWD) — 5.0L/302 SBF
- 1985 Ford Mustang (RWD) — 5.0L/302 SBF
- 1986 Ford Mustang (RWD) — 5.0L/302 SBF
- 1987 Ford Mustang (RWD) — 5.0L/302 SBF
- 1988 Ford Mustang (RWD) — 5.0L/302 SBF
- 1989 Ford Mustang (RWD) — 5.0L/302 SBF
- 1990 Ford Mustang (RWD) — 5.0L/302 SBF
- 1991 Ford Mustang (RWD) — 5.0L/302 SBF
- 1992 Ford Mustang (RWD) — 5.0L/302 SBF
- 1993 Ford Mustang (RWD) — 5.0L/302 SBF
Frequently Asked Questions:
Q: What port shape do these headers use? These headers use 1-1/2" x 1-1/4" rectangular ports, compatible with standard SBF rectangular port cylinder head configurations on the 5.0L/302 Fox Body Mustang.
Q: What is the collector size on these headers? These headers feature a 2.5" collector with merge spikes.
Q: What is the bolt hole spacing on these headers? The outer bolt holes are 15-1/8" center to center, matching standard SBF head bolt spacing.
Q: What bolts are included? 3/8"-16x1" zinc header bolts are included with the headers.
Q: What is the difference between these headers and the 1964–1977 SBF shorty headers (25-1240)? Part 25-1239 is a direct-fit shorty header specifically designed for the 1979–1993 Fox Body Mustang 5.0L/302. Part 25-1240 covers the classic 1964–1977 Mustang, Maverick, Fairlane, Falcon, and Mercury Cougar SBF applications. Both feature rectangular ports and merge spikes but are engineered for different chassis configurations.
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 with the headers.
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).