New Bypass Reg Replacement Diaphragm, Spring 49-4500/4501 Cooling Whether replacing an OEM unit

Whether replacing an OEM unit or refreshing your system-specific pump

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

This allows ease oftune with a smooth idle which provides linear acceleration

Part Number : PFE920-12FSBK

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

New Bypass Reg Replacement Diaphragm, Spring 49-4500/4501 Cooling Whether replacing an OEM unitPart 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.