13B Primary Rail

Primary Rail only

This rail is adjustable to fit the following:

13B
13B-T
13B-RE
13B-REW

**Made for "American" / 14mm O-Ring Injectors. **
**Does not accept "Japanese" / 11mm **
**Different Injector Spacers required for specific fit on motors listed above**

*****For those using Bosch 160lb Injectors with the O-ring that comes on the Injector NEW, Please be advised that this O-Ring WILL Leak as the Primary Rail is made with a slightly larger bore than the Secondary Rail. This is not a mistake, they are made this way intentionally as a limited number of individuals are running 160lb Injectors in the Primary Location. They are made to accept the slightly larger O-Rings fitted on other (Non-CNG) more commonly used aftermarket "Primary" Injector sizes. If you are unsure what O-rings you need, our part number for them is 1-108*****