New Bypass Reg Replacement Diaphragm, Spring 49-4500/4501 Cooling allows the use of AN

allows the use of AN hose and fittings for radiator hose applications

This eliminates the possibility of trapping pressure when activating the valve

Single diaphragm boosters are compact for installation under the floor or on firewalls of almost any vehicle

Theyhave a one-piece billet rail CNC machined from 6061-T6 aluminium to guarantee a precision flat surface for superior sealing

-8 AN Male Threads PFE1000-08B

New Bypass Reg Replacement Diaphragm, Spring 49-4500/4501 Cooling allows the use of ANPart Number: AF59 4501 replacement diaphragm and spring kit. this diaphragm and spring kit suits the new design Aeroflow performance bypass fuel pump regulators. The new design comapred to the previous design has a octagon style top hat. The part numbers are af49 4500 and af49 4501.