Blox Racing fuel injector height adapters are CNC machined from billet aluminum, then anodized. 

Height adapters are designed to fit over 11mm or 14mm bore fuel injectors and help adapt a shorter injector to your specific needs. For example, using a 1/2" adapter on a 38mm injector will turn it into, basically, a 48mm injector. 

Height adapters are available in ½” and 1” length and with 11mm and 14mm bores.  Height adapters include new, Viton O-rings.

Available as single adapter, set of 4, or set of 8.