The FF3GTS header set was primarily designed for 1964-73 Ford Mustang applications. However, the FF3GTS is a good choice for a variety of other vehicle applications, including the 1963-70 Ford Falcon, some truck applications, 1960-65 Ford Ranchero, Torino, Mercury Cougar, and other applications. The FF3GTS features excellent spark plug and ground clearance while providing performance gains over factory exhaust manifolds.
- The FF3GTS is compatible with GT40-P cylinder heads!
- Be sure to select the correct engine group (221-302 vs. 351w) and transmission when ordering.
- Please Review the “SB Ford Flanges” information tab.
Includes all hardware necessary for installation.
Engine: Small Block Ford 221-302, 351W V8
Primary Tube Diameter: 1½”
Collector Diameter: 2½”
- 16-Gauge Primary and Collector Tube Thickness
- 3/8″ Thick Flange
- Patented Flange Design Requires NO Gaskets
- Tightest Fitting Header Available Anywhere!
- Made in the USA
- Header Bolt Set
- Collector Reducer Set
Our Ceramic Coating is recommended for every vehicle application and is the default finish selection choice above. To meet high standards of quality, We apply a multi-layer inside and outside aluminized ceramic coating in-house and then polish the coating to a high luster. This aerospace and military-grade technology adds excellent protection to your headers while offering the benefit of thermal control in your engine bay. It also improves cylinder scavenging of exhaust gases and increases the longevity of your header investment.
SB Ford Flanges
IMPORTANT UPDATE: Our small block Ford header flange has been redesigned to accommodate both standard rectangular and square exhaust port designs. This new flange is compatible with 2.0″ mounting bolt spacing
We are keeping the content below for informational purposes.
We offer two primary header flange styles for small block Ford engines. The standard rectangular port flange and a square port flange with 2.0″ bolt spacing. Factory OE Ford heads use a 2.0″ bolt spacing. Some aftermarket small block Ford cylinder heads include both the 2.0″ and 3.0″ bolt spacing Roush heads (SB427 for example) only use the 3.0″ bolt spacing.
The 3.0″ bolt spacing is a problem for thick-flange header sets because it makes installing the spark plugs virtually impossible, as shown in the images below. Only header sets built with thin 1/4″ – 3/16″ flanges are compatible with the 3.0″ bolt spacing.
Many aftermarket cylinder head manufacturers now use the square port shape on their products. However, that does not mean the square flange is required. The importance here is to ensure the header flange properly seals to the cylinder head. In most cases, the standard rectangular shape works perfectly, but on other heads, the square port flange is necessary. It is the customer’s responsibility to decide the correct flange for their application.
NOTE: Extra charges are incurred for headers ordered with the square port flange due to the additional manufacturing time required when building headers with the square port flange.
Below are two images showing the differences between the rectangular vs. square flange styles. The square flange shown utilizes the 2.0″: bolt spacing. Please use these images and the provided dimensions to ensure the proper flange is selected for your new Sanderson Headers from the drop-down menu on the product details.