SKU: HLY12-848
UPC: 090127670521
MPN: 12-848
The Holley 4500 Billet Fuel Pressure Regulator with EFI Bypass is designed for builders and mechanics who require precise fuel delivery in high-performance carbureted and EFI applications. This regulator is essential for any serious fuel system, managing rail pressure to ensure consistent atomization and combustion across the RPM range.
Constructed from durable billet aluminum, the 4500 regulator provides superior heat dissipation compared to cast alternatives, making it ideal for high-fuel-flow applications. The integrated EFI bypass circuit allows for seamless switching between carbureted and fuel-injected configurations without the need for component swaps, which is particularly useful during platform transitions or experimentation.
Professional builders, restoration shops, and performance enthusiasts will find this regulator's adaptability and precision invaluable. Its compact design and lightweight construction facilitate straightforward installation in tight engine bays, while maintaining pressure stability under varying load conditions to prevent lean stumbles or rich-running issues.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
