Phenolic spacers and washers are included to thermally insulate the fuel rail from the cylinder head
See the general recommendations below:
87lb seat pressure at 42
Epoxy Element -40 to 150degC (Matches Popular GM Calibration)
Radium Dry Break 1.5" Female, Direct Mount, Vented jack stands Phenolic spacers and washers areDesigned for direct mounting onto a fuel cell. For mating, a 6 bolt flange with a 2. 18" PCD bolt circle (as found on the FCST) is required. Includes 20 0549 V Dry Break, 1. 5in, Female, Vented as well as an aluminum housing, stainless steel hardware, and a gasket. The components, materials, and seals are compatible with all fuel types (unleaded and leaded gasoline, diesel, AV gas, methanol, ethanol, E15, E85, etc.). Specifications: Height: 3. 43"