Building a custom turbo setup around a classic small block Ford? Speed Engineering's 1-3/4" forward facing down SBF turbo headers give you a well-built, mandrel-bent foundation for your turbo system — compatible with the full range of small block Ford Windsor and Cleveland engines from 3.6L through 5.8L. CNC-machined flanges, merge spikes, and a short 3" collector sized and oriented specifically for forward facing down turbocharger placement. 3/8"-16x1" zinc header bolts included.
Built from 304 natural stainless steel with TIG-welded construction and standard graphite manifold gaskets included.
Features:
- Full 1-3/4" Primary Tubes with Merge Spikes — Sized for turbo applications on small block Ford engines
- 1-3/4" x 1-1/4" Rectangle Ports — Matches standard SBF rectangle port cylinder head configurations
- 3" Short Collector with Merge Spikes — Compact collector design optimized for forward facing down turbocharger placement
- Forward Facing Down Orientation — Turbocharger placement flexibility for custom turbo builds
- 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
- 15-1/4" Center to Center Outer Bolt Holes — Standard SBF bolt spacing
- 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 Small Block Ford 3.6L, 4.3L, 4.7L, 5.0L, and 5.8L V8 Engines
- V8 Engines Only
Compatible Engines:
- Ford Small Block 3.6L (221ci) — Windsor
- Ford Small Block 4.3L (260ci) — Windsor
- Ford Small Block 4.7L (289ci) — Windsor
- Ford Small Block 5.0L (302ci) — Windsor/HO
- Ford Small Block 5.8L (351ci) — Windsor/Cleveland
FAQ
What Ford engines are these headers compatible with?
These headers are compatible with Ford small block V8 engines ranging from 3.6L to 5.8L including the 221ci, 260ci, 289ci, 302ci, and 351ci Windsor and Cleveland family engines.
What is the difference between these SBF turbo headers and the Coyote turbo headers (25-1175)?
The key difference is the engine family. Part 25-1176 is designed for the classic Ford small block Windsor/Cleveland family (3.6L–5.8L). Part 25-1175 is designed for the modern Ford 5.0L Coyote (2011–2023). These are completely different engine architectures with different head bolt patterns and port configurations.
What direction do the collectors face?
The collectors face forward and downward, making these headers suited for custom turbo builds where the turbocharger placement requires a downward-facing orientation.
What port shape do these headers use?
These headers use 1-3/4" x 1-1/4" rectangle ports, compatible with standard SBF rectangle port cylinder head configurations.
What is the bolt hole spacing on these headers?
The outer bolt holes are 15-1/4" center to center, matching standard SBF head bolt spacing.
What bolts are included?
3/8"-16x1" zinc header bolts are included.
What collector size do these headers use?
These headers feature a 3" short collector design with merge spikes for a compact, turbo-friendly profile.
What material are these headers made from?
304 natural stainless steel with full TIG-welded construction, CNC-machined flanges, and merge spikes.
Are gaskets included?
Yes. Standard graphite manifold gaskets are included. Header bolts are also included.
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).
