Upgrade your 1999–2003 Ford 7.3L Power Stroke with the AVP Fuel Pressure Regulator "Blue Spring" Upgrade Kit and restore your fuel pressure to factory or better levels. This kit directly addresses common 7.3L fuel starvation and low pressure issues, helping prevent injector damage, rough idle, and slow spool-up.
A straightforward 30-minute install, this complete kit includes an aluminum housing cap, new mounting bolts, the all-important blue spring, brass fuel poppet valve and guide, poppet valve seat, and every o-ring and seal required for a full fuel bowl and regulator rebuild. The upgraded spring increases fuel pressure, preventing air in injectors during heavy load and prolonging injector life.
Typical results include quieter idling, faster engine response, improved turbo spool, and greater injector longevity. Kit matches and replaces OE part F81Z-9H323-BB and similar blue spring kits. No tuning required—just install and drive with confidence. Covered by AVP’s 12-month, unlimited-mile warranty for peace of mind.
