BLOX Racing metric to -AN fuel adapter fittings for 440-LPH external fuel pumps. These fittings are precisely machined from quality materials to provide proper threading and sealing, to ensure optimal performance even in extreme applications where high fuel flow rates and pressures are encountered. A crush washer is included with each fitting adapter. 
Note: 440-LPH fuel pump (BXFU-04440) sold separately. Crush washers (2-pk) available as replacement parts. 
*WARNING* It is highly recommended that a qualified mechanic with fuel systems knowledge performs the installation.  Working with fuel and pressurized systems is dangerous and can lead to serious injuries or death.  

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