Set of six adaptors to fit 14mm top feed injectors to RB25DE and RB25DET intake manifolds.

The injector adaptors use a Viton o-ring to seal into the Nissan RB25 intake manifold, and have a 14mm bore to suit aftermarket 14mm top feed injectors. 

Replacement of the standard side feed injectors with aftermarket top feed injectors is common practice as top feed injectors are available in a wider variety of flow rates and are considerably cheaper.

The six adaptors are CNC machined from billet 6061 aluminium at our factory in Napier, New Zealand, and are black anodised for corrosion resistance.

An aftermarket top feed fuel rail is required to be used with these adaptors. The injector adaptors replace the flat, round factory injector lower seal and fit directly into the 25.6mm bore on the RB25 intake manifold. Please note that some aftermarket intake manifolds have different sized machining and often a sharp edge which can make the o-rings tight and harder to install. It is recommended to check the size on an aftermarket manifold, as well as hand chamfering the top edge of the injector seal port to prevent damage to the o-rings on installation. 

Sold in sets of 6.