Compatible with LS3/LS7 Fuel Rails on FAST 146102 Intake Manifold; FAST LSXR LS3/LS7 fuel injector spacers are designed to extend your short stock fuel injectors to the same length as the longer-style injectors. These kits include spacers and O-rings. Allows use of factory equipped LS3, L99 and L76 fuel rails to be used with FAST part number 146102 only.;.
